TRNi
4L60E Fix Database

4L60E Fixes for 2002 & 2003

QUESTION:


Date: Sat Jan 5 01:18:30 PST 2002
Subject: 4L60E, no 2nd drags on 4th
Vehicle: 93 chevy z71, 5.7
Mileage: 105000

PAST REPAIRS;

Original Customer Complaint: slips in 2nd & 4th

Original Codes Present: none

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: no 2nd drags on 4th

Codes Currently Present: none

Work Completed: removed trans, band was very burnt and drum hot. o/h, replaced input drum and epc. on test dr, shift 1/2 good, 2/3 good. when it shifts to 4th it feels like you have a 10,000 lb trailer behind you. slow down do several more upshifts, the same problem.just before i get back to the shop it looses 2nd. remove pan, see a piece of band material and fluid burnt odor. remove trans. band black. ck servo, v/body. could find nothing wrong. reinstalled. same problem. pressure test good, 60 at idle goes up w/throttle. replace v/body, same problem except on test dr no 2nd from getgo. grab another core, build it, works perfect. will disassemble original trans in the am.

Summary: none

Preston Farmer - 0

TRNi Member Since: 10/03/2001 (11 | 24)

RESPONSES:



FIX:


Date: Sat Jan 5 11:49:03 PST 2002
Subject: 4L60E, no 2nd drags on 4th

drag on 4th caused by locked up input sprag. loss of 2nd was a result of sprag and finish on drum too rough, it wiped the band lineing right off. Todd, i would suggest changeing the complaint to "binds up on 3/4 shift" since the loss of 2nd was not aprimary problem. But if i'm not mistaken, binds up 4th is already in fix base. thanks to those who responded. ip

Preston Farmer - 0

TRNi Member Since: 10/03/2001 (11 | 24)

End Of Thread





QUESTION:


Date: Fri Jan 11 22:21:39 PST 2002
Subject: 4L60E, P1870 Only Pulling A Grade
Vehicle: 1996 Chevrolet Suburban, 350 V-8
Mileage: 68,756

PAST REPAIRS;

Original Customer Complaint: Blowing fluid out of vent and transmission overheating.

Original Codes Present: P1870 TCC Slippage

Previous Repairs: Rebuild, Shift Kit, Woven Carbon Fiber Converter, All internal transmission electrical components, flat sanded pump halves, v/b, and torque everything to specs.


REPAIRS THIS VISIT;

Current Customer Complaint: "It's doing the same thing as before. The check engine light comes on and 'my mechanic' tells me it has a slipping torque converter due to the P1870 code."

Codes Currently Present: P1870 TCC Slippage

Work Completed: None, yet. Customer will be back this Monday.

Summary: I orginally put the Life Temperature recorders on both cooler lines from the get-go and they show neither cooler line has ever been over 190F. I'm aware of the Sonnax products that address this issue, but I opted for the TransGo route, because it's supposed to fix this problem. My supplier didn't have the Sonnax products readily available, but had the Shift Kit in stock. From my understanding, the Shift Kit fixes this problem. I read the Fix Database first and found an interesting article written by Dan Tucker on diagnosing this often talked about problem. I have not had the opportunity to try his method, yet. Does the TFT affect lock up apply? Could I have the wrong converter in the vehicle because it didn't come with a Woven Carbon Fiber converter. Any thoughts, ideas, or suggestion are welcome.

Larry Bloodworth -

TRNi Member Since: 9/26/97 (11 | 44)

RESPONSES:



FIX:


Date: Sun Jan 20 15:07:04 PST 2002
Subject: 4L60E, P1870 Only Pulling A Grade

Replaced valve body with GM reman valve body. Hey, guys...feature this: I E-mailed Howard Johnson at Sonnax for a reamer and valve setup. My local supplier (ATC) had the reamer and valve in stock. About $130 for the reamer and $70 for the valve set up. Just for grins & giggles, I called my local GM dealer and they had the whole valve body WITH ALL THE ELECTRONICS (except pressure manifold switch) for only $130!!! I paid more than that for just the transmission's internal electronics. I'm guessing they are reaming the valve bore, too; because there's a $40 core charge on the valve body. So, I spent $170 and have $40 coming back. The core I sent back I stripped the $200 worth of electronics I previously bought and installed. :-( The next 4L60E I build...forget buying all the electronics. I'll just buy a valve body and get all the electronics (except pressure manifold switch and internal wiring harness)

Larry Bloodworth -
larrybloodworth@hotmail.com
TRNi Member Since: 9/26/97 (11 | 44)

RESPONSE TO FIX:

Date: Sun Jan 20 16:24:11 PST 2002
Subject: RE: 4L60E, P1870 Only Pulling A Grade

Larry, I'd really be curious to find out if that VB HAS been fixed (reamed). I kinda doubt it has. Has it been installed yet? If not, take a look at it....please. But, with your lengthy warranty, I'm sure you'll find out one way or another. Hopefully it'll be a "no news is good news" scenario. Also, are you SURE the electronics are REALLY new, & not "remans" just like the VB? You know, just like Mopar does? The price is a pretty good clue as to what they do to these VB's. Think about it: would YOU do a VB with new solenoids, filter, acc. piston w/seal & a valve bore repair for $130.00? And as far as the reamer tool(s) are concerned; 2 jobs & it's paid for. Right Howard? It just sounds too good to be true. BUT, I DID hear about it on the Internet. ;<)

Ted Turney -
tedeb@pacbell.net
TRNi Member Since: 11/1/96 (1 | 54)

RESPONSE TO FIX:

Date: Sun Jan 20 17:53:44 PST 2002
Subject: RE: 4L60E 1870 PULLING A GRADE FIX

Larry- Watch out on these rebuilt GM V.B's. G.M. does nothing to compensate for AFL bore wear.I was told this at the Expo '01 by one of the seminar speakers. And, I'll wonder if all the solenoids are new, or "tested." Glad you fixed it.

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (1 | 172)

RESPONSE TO FIX:

Date: Sun Jan 20 18:59:42 PST 2002
Subject: RE: 4L60E, P1870 Only Pulling A Grade

Larry, I've seen the prices on these valve bodies range from $130 to $550, depending on application. Don't ask why, no one seems to know. Anyway, I work for a GM dealer and I cringe every time I have to put one of these in. It's like playing Russian Roulette. I would also check different suppliers. I just got one of the Sonnax valves on Friday for about $35 from Transstar. The reamer was a one time purchase of about $100 that paid for itself a long time ago. Hope this helps.....

Larry Utter -
lcutter@warwick.net
TRNi Member Since: 1/11/98 (0 | 18)

RESPONSE TO FIX:

Date: Mon Jan 21 12:22:53 PST 2002
Subject: RE: 4L60E, P1870 Only Pulling A Grade

in referance to tcc ramping on. I think it was jimmy who mentioned the 90% and 95% and the sequence of ramping on. I just finished driveing a 95 buick park ave and it's sequence is totaly different. tcc duty cycle is 0 until tcc is commanded on and then snappy starts at 100% AND very quickly goes down to around 45%. it then moves up and down with throttle but never higher than 49%. tcc slip moves from 5 to 20. once it gets hot, duty cycle starts at 100%, drops quickly, pauses at 45% then continues down to 0%. tcc slip never showes any decrease. is it supposed to ramp up like the 4l60e we've been discussing?? ip

Preston Farmer - 0
ipz73@aol.com
TRNi Member Since: 10/03/2001 (12 | 32)

RESPONSE TO FIX:

Date: Mon Jan 21 13:57:51 PST 2002
Subject: RE: 4L60E, P1870 Only Pulling A Grade

jimmy my statement that tcc slip showes no decrease when duty cycle is o% may have been clear as mud. what i meant was/when hot as duty cycle ramps on, indicated tcc slip does not decrease. tcc continues to slip, then duty cycle continues to 0%

Preston Farmer - 0
ipz73@aol.com
TRNi Member Since: 10/03/2001 (12 | 33)


End Of Thread





QUESTION:


Date: Thu Jan 17 17:08:40 PST 2002
Subject: 4L60E, po1870 97 S-10
Vehicle: 1997 chevy S-10, 2.2 4cul
Mileage: 45000

PAST REPAIRS;

Original Customer Complaint: dealer screwed it up

Original Codes Present: didn't check

Previous Repairs: Dealer put in reman.


REPAIRS THIS VISIT;

Current Customer Complaint: check engine light on

Codes Currently Present: PO1870 tcc slip

Work Completed: none

Summary: This thing originaly came in with converter making metal.The said converter was painted gray with no codes or stickers. Converter was replaced with apaper clutch,10thvin is v,sonnax pwm valve,complete overhaul with all electronics. It has came back twice with fluid looking like motor oil.It takes about 100 mile trip to turn the light.MY QUESTION IS DOES IT NEED A CARBON CLUTCH.With snappy scanner half way through 1st gear tcc duty cycle goes to 90%,is it possible to have a carbon clutch in a 1997. Thanks in advance Fred.

Fred Whitaker - 0
ibsprag@hotmail.com
TRNi Member Since: 10/31/2001 (1 | 1)

RESPONSES:


UPDATE:


Date: Fri Jan 18 18:14:16 PST 2002
Subject: 4L60E, po1870 97 S-10

Thanks for all the responses.This thing has sat on A trash can all week.I finale tore it apart today.All clutches and band cherry.Bushings were starting to get Hawaiian daisies {LAKALUBE} I found the plastic duffus under the orifice in the pump against the lockup valve and rejoiced.Wen,t to lunch thought about it ,looked at it ,looked at it and I aint buyin it.I got the plastick housing with checkball and spring out without destroying it.I could visualise pump pressure knocking this ball capsule against the lockup valve,but I have a vivid imagination.The capsule is in one piece,could it wedge the valve?Too bad we all cant do this in a beer joint. THANKS From Fred

Fred Whitaker - 0
ibsprag@hotmail.com
TRNi Member Since: 10/31/2001 (1 | 2)

MORE RESPONSES:



FIX:


Date: Mon Jan 21 17:39:59 PST 2002
Subject: 4L60E, po1870 97 S-10

After having this thing on the back burner for over a week,first thinking carbon clutch,that wasn't it.Then I found the plastic orifice under the ball and spring above lockup valve in the pump cover. I was convinced that was it. Then I flopped the valve body on the bench,It already had sonnax valve&%>?!-3,I was gonna block it with a piece of cooler line Inner pump springs are hard to come by.That's when I FOUND IT the LITTLE VALVE THAT GOES IN BOTTOM OF BORE RATTLES AROUND LIKE A BB IN A TIN CAN. THE VALVE BODY IS WORN OUT ,CHEWED UP ,WASTED. The sonnax valve boring tool only uses this bottom bore as a guide,they should resleeve and revalve entire bore.Ive been working on transmissions too long and am sick os fixes that don't work.I didn't look there because this is supposed to be the fix,oh well. thanks for all the responses Fred

Fred Whitaker - 0
ibsprag@hotmail.com
TRNi Member Since: 10/31/2001 (1 | 2)

RESPONSE TO FIX:

Date: Sun Jan 27 09:31:17 PST 2002
Subject: RE: 4L60E, po1870 97 S-10- fix

Fred, Glad you worked on this thing until you actually found the problem and reported the fix, however I don't think that Sonnax deserves critisism for not fixing this particular problem. If you have been in this businsess for any length of time, you will know that life before Sonnax, in particular the Task Force and all the fixes they have developed, was a crap shoot. Your choices were replacing a worn out valve body with another worn out valve body from a used parts supplier, or purchasing a new one from the dealer. Did you ever try to buy a rebuilt valve body from a dealer 15 or 20 years ago? I believe the only reason there are dealer available rebuilt v/bodies today is because of Sonnax (and others in the aftermarket) and their fixes. Look what happened when the aftermarket began making E4OD Boost Valves/sleeves for the pump- Ford decided it was now OK to sell that part without the rest of the pump assembly. Regarding your particular problem, others have already pointed out that there is a good chance the valve body had already got the GM re-bore, which is larger than the Sonnax kit, and I would have to agree. We have been checking these valves and installing the kit almost since they were developed and I have never seen a valve so loose as to 'rattle like a BB', even though most of the units we are now doing have 180,000 to 300,000 miles on the odometer. In addition, you also stated you didn't check the valve because it was suppose to be the fix. Welcome to the assumption club, which like you, every tech worth their salt will someday join as they fail to re-check their own or others work and get burned. In this case, you have to assume that the previous tech checked the bore for proper size/wear before reaming, installed it in the correct line up, and that the tech also checked it after to ensure he/she didn't screw it up performing the task. I would also urge you to not rely solely on this particular valve repair as the total fix. We are now finding, as others have found before us, that the AFL valve kit in the valve body and the TCC valve kit in the pump need to be installed in nearly every unit with high mileage. This may not be the proper forum for this type of post reply however I feel very strongly that to knock aftermarket companies like Sonnax is to shoot ourselves in the foot. Keep in mind that they are normal people like ourselves and that they have and will make mistakes, although they are the first to admit when they do. The most important thing we have to realize is that without these repairs, the small independant shop will never be able to compete with factory or large reman operations. And just in case you are wondering, I do not work for Sonnax or receive special discounts, however I am constantly amazed as I see a never ending line of new fixes and read all the useful tech info in their catalogues. In addition, you can actually speak with a knowledgeable tech and get anwers to your problems in a hurray.

David Schaffel - MTO Enterprises
dbschaffel@shaw.ca
TRNi Member Since: 6/9/00 (0 | 71)

RESPONSE TO FIX:

Date: Sun Jan 27 12:45:20 PST 2002
Subject: RE: 4L60E, po1870 97 S-10- fix

Dave, I applaud your reply! This is a very good point we all need to understand! There are numerous points of view (opinions) and we don't always agree. We need companies like SONNAX to supply these valves and tools. With electronic controls and much higher service life, we have few alternatives! Thank you very much for taking valuable time to craft a very necessary reply. Wayne Russell

Wayne Russell -
rusauto@mediaone.net
TRNi Member Since: 11/11/98 (0 | 17)


End Of Thread





PROBLEM / FIX:


Date: Wed Feb 6 04:33:15 PST 2002
Subject: 4L60E, tcc slip at hard throttle-no codes
Vehicle: 1994 GMC 6.5 Diesel 4X4 Truck 1/2 ton.

Problem / Fix: This was a weird one that I thought was interesting, and hope it helps someone. This truck had previously been rebuilt by me at 90,000 miles due to a broken reaction shell.Complete overhaul with new OEM solenoids,Sonnax reverse boost valve,new OEM accumulator pistons, and Precision t.c. The 2-4 band was the hi-energy oem band and was re-used. Now, 145,000 miles on it,truck comes in for a complaint of tcc shudder on apply.Test drive verifies complaint.No codes stored. Pressure is 65-70psi hot,and rises well with throttle opening. For grins, I pull the v.b.,and find the tcc regulator bore worn badly.I installed the Sonnax -03 kit,and a tcc apply solenoid. Test drive and apply shudder is gone,..but scanner shows a tcc slip of 60-80rpms in D4 or D3 on hard acceleration.And tft has to be above 150 degrees F. O.K...I guess the t.c.lining has been slipped too long,so we pull the unit and install a new t.c.(pan and filter were clean as a whistle.) Road test reveals the same problem. After hearing that the afl bore is prone to wear,I pulled the v.b. again,and sure enough, the afl bore IS worn.I installed the Sonnax fix,and also the Sonnax tcc apply valve in the pump stator. SAME PROBLEM! Out it comes again, and this time I pulled the pump and input drum(thinking maybe burned 2-4 band or 3-4 clutches. I could not find a thing wrong with the pump,and the band and clutches look like they were installed yesterday! There was a leak in at the input drum(where the input shaft is pressed into the drum, but still no friction damage.) SHOTGUN APPROACH! I replaced the pump and input drum(re-used the 3-4's),and another t.c. SAME THING!!!!!!! I decide there must be a problem in the v.b.that I can't find,so as I'm changing it,I decide that I might as well install new v.b. gaskets.When I removed the 1-2 accumulator housing,the piston just fell out! NO DRAG on the seal at all,and the accumulator housing was worn badly. What the heck? I stop removing the v.b.,and install a good 1-2 acc.housing and piston, and.... IT'S FIXED! No tcc slip even at 190 degrees F. It appears that the loss of 2nd clutch oil VOLUME was the culprit.This oil feeds the tcc signal valve, and from there it goes to the tcc apply valve.So in my way of thinking, this loss of VOLUME caused this on-off tcc system to work kinda like a pwm tcc system. I believe the reason that the 2-4 band wasn't burned was because it was receiving enough pressure and volume to keep it applied. I don't have hydraulic charts for this trans...YET, so I have to really say a BIG THANK YOU to JIMMY TAYLOR who was kind enough to send me some and even call me on the phone. Also, and I'm going from memory here---Dan Tucker,Robert Bruce, Sam Pitts, Billy Anthony,Stevie Lavallee and ATRA. If I missed anyone, please except my appology. Sorry for the long post..just hope this helps someone.I would like to quote a friend who said "when you have a problem, don't start looking on the 25th floor...start in the basement..the root cause is almost always there."

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (1 | 180)

End Of Thread





QUESTION:


Date: Fri Feb 8 15:39:14 PST 2002
Subject: 4L60E, p1870 after 35-45 miles
Vehicle: 1996 gmc yukon, 350 5.7
Mileage: 123000

PAST REPAIRS;

Original Customer Complaint: p1870 trans component slipping

Original Codes Present: metal in pan burnt fwds band smoked ect.also pump stator shaft was spline damaged replaced with aftermarket bolt on. p1870

Previous Repairs: mrk with steels trans go sk pump stator shaft gm33cw rpm/atc woven carbon fibre conv.band filter flush cooler 2nd visit a gm reman valve body and checked wire harness groud harness was factoy updated(no change needed)various scans ect.


REPAIRS THIS VISIT;

Current Customer Complaint: p1870 keeps coming back trans seems to drive fine all shift components are within .50 sec.on shifts all shifts completed ect pressures fine ect. can drive all the time around town and all is ok but after hot frwy trip thats when all goes bad.

Codes Currently Present: p1870

Work Completed: valve body in pan harness ect.

Summary: HELP!!!!!!!!!!!!!!!!!!!

Robert White -
doctranyyy@cs.com
TRNi Member Since: 7/14/99 (2 | 0)

RESPONSES:


UPDATE:


Date: Tue Feb 12 11:38:25 PST 2002
Subject: 4L60E, p1870 after 35-45 miles

Please understand that before I post anything we go thru all tech on the site first! 2nd we had a trans go kit in it 1st,then when it came back we installed a dealer valve body next,all GM valvebodys are either hogged out or the castings are new. 3rd the wire update was not needed due to a factory (mid production)change. Both slots for the ground wire pins had a black/white tracer in them.Same color code as update. SO where do we go from here? Also I hope all of the experts out there realize that on this trany that a code 1870 can be any trans component slipping NOT just the TCC circuit? Note all the shift error times are within spec.appx.53 of a second.Also atc/rpm sells only the woven clutch on these units as to there h.d. status?we are told by them that this is tested and ok? have anything else to add??? thanx bob white

Robert White -
doctranyyy@cs.com
TRNi Member Since: 7/14/99 (2 | 0)

MORE RESPONSES:



FIX:


Date: Tue Feb 19 11:14:08 PST 2002
Subject: 4L60E, p1870 after 35-45 miles

Wrong lining in the converter don't believe anybody CARBON WOVEN DOES NOT WORK IN ANYTHING BUT E CUBED E3 type system.it doesent matter what valves,shift kits or anything else you do dont use woven lining except 98 and up.

Robert White -
doctranyyy@cs.com
TRNi Member Since: 7/14/99 (2 | 0)

RESPONSE TO FIX:

Date: Wed Feb 20 04:22:12 PST 2002
Subject: RE: 4L60E P1870 AT 35-40 MINUTES

Robert- Glad you fixed it! A lot of people took time to help steer you in the right direction. Thanks for sharing your fix.

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (1 | 190)


End Of Thread





QUESTION:


Date: Thu Feb 14 14:26:38 PST 2002
Subject: 4L60E, speedo not working.
Vehicle: 1993 chevy g10, 4.3
Mileage: 93000

PAST REPAIRS;

Original Customer Complaint: only 2nd gear. No upshift. speedo started to fail at the same time the transmission started to fail.

Original Codes Present: none

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: speedo still not working. delayed 1-2. no 2-3 or 3-4. no output rpm.

Codes Currently Present: 16 - vss drop out

Work Completed: overhauled transmission. Replaced vss.

Summary: Any advice? I was also told that the drac sensor might have something to do with this problem. Does anyone have the drac connector pin designations, I.E. vss signal, ground, etc. I've checked a few sources, including alldata, and all they have are generic diagrams.

Leon Lepore - 0
l_lepore@yahoo.com
TRNi Member Since: 1/4/2002 (1 | 0)

RESPONSES:



FIX:


Date: Wed Feb 20 09:36:25 PST 2002
Subject: 4L60E, speedo not working.

I found that we had a faulty DRAC. We replaced it and the van runs fine.

Leon Lepore - 0
l_lepore@yahoo.com
TRNi Member Since: 1/4/2002 (1 | 0)

End Of Thread





QUESTION:


Date: Tue Feb 19 14:57:46 PST 2002
Subject: 4L60E, complete oh with tc electronics and pres
Vehicle: 98 chevy 1500 van, 350
Mileage: 130000

PAST REPAIRS;

Original Customer Complaint: no reverse

Original Codes Present: none

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: no reverse untill throttle is applied

Codes Currently Present: nomne

Work Completed: pulled unit back apart, replaced rev drum inspected pump,air test and reassembled Same problem, no reverse untill throttle is applied. Pressure test 55idle in drive 150appx at stall 75 idle reverse over 200 stall

Summary: let me clarify pressures drive idle 55psi drive stall 150psi rev idle 753 rev stall over 200 sorry but dont rember xact psi numbers My builder and have looked this thing over 3 times and dont see anything, this was supposed to be one of those gravey jobs. What are we over looking? DAN ALLEN DANCO TRANSMISSIONS 850-689-8646

Danny Allen -
danco@cfi.net
TRNi Member Since: 10/18/00 (3 | 3)

RESPONSES:



FIX:


Date: Fri Feb 22 08:28:48 PST 2002
Subject: 4L60E, complete oh with tc electronics and pres

Thanks to everyone who replyed, We pulled the unit one more time and inspected all related components and one again found no reason for the reverse problem, so we decided to take the advise recieved and modify the piston bleed hole. Plugged hole and drilled .050 releafe hole changed the cushion and put steel plate on bottom. Installed unit and works perfect! The part that still puzzles me is what was wrong, we do anywhere from 10 to20 of these units per month and this is the only one to give this problem, in fact have done 6 98 and 99 modles this week so far with 2 more in the lot wating. Just when you think you walk on water.Just kidding! Once again thanks to all who replied the info was greatly appreciated. DAN ALLEN DANCO TRANSMISSIONS CRESTVIEW FL. 850-689-8646

Danny Allen -
danco@cfi.net
TRNi Member Since: 10/18/00 (3 | 3)

RESPONSE TO FIX:

Date: Fri Feb 22 10:56:10 PST 2002
Subject: RE: 4L60E, complete oh with tc electronics and pres

Danny Feed & Bleed system.. More bleed than feed... lower volume at idle.. Been doing Gil's fix for many years. You may not have noticed it because of idle speed or any # of reasons, but it is there. We always drill & put 400 cup plugs on both sides of Rev. piston.. Only takes a minute. We then are able to reinstall the cushion spring & avoid harsh Rev. engagement. Thanks for posting the real fix. R.

Richard Webb -
gearmaster@reachone.com
TRNi Member Since: 6/22/97 (9 | 12)


End Of Thread





QUESTION:


Date: Tue Feb 19 20:06:49 PST 2002
Subject: 4L60E, No Line Rise 4l60E (19940
Vehicle: 1994 GMC 4X4 Pickup, 5. L
Mileage: 111K

PAST REPAIRS;

Original Customer Complaint: Tow in. No move. Bad TC

Original Codes Present: 67 or 69 (I forget)

Previous Repairs: Rebuilt 2 years ago


REPAIRS THIS VISIT;

Current Customer Complaint: Has not left shop. No line rise. Replaced TC, guts were fine.

Codes Currently Present: None

Work Completed: Replaced TC, vehicle shifts fine for about 5 miles and then begins to downshift or slip. No line rise. Pressure is 75# in all ranges except R, then it jumps to 85#

Summary: Before replacing TC, unit was disassembled and was fine. I'm planning on replacing entire internal harness along with a new PCS in the AM. Old PCS checked out at 5.0 ohms. Computer shows no codes and all tests except for line rise appear to be in order according to Snappy. Thanks. Jim, III

James J. Schier III - Discount Transmission Center
stardust@frontiernet.net
TRNi Member Since: 10/22/97 (11 | 273)

RESPONSES:



FIX:


Date: Sun Feb 24 21:52:20 PST 2002
Subject: 4L60E, No Line Rise 4l60E (19940

PCS solenoid checked out. On a whim I replaced it. Vehicle is fixed and gone. I'm not even going to bother to check the PCS anymore, it will just become a rebuild standard to replace it. This is the second time that I have been fooled, there will not be a third. I truly thank the handful that replied and I will REMEMBER who you are. Jim, III

James J. Schier III - Discount Transmission Center
stardust@frontiernet.net
TRNi Member Since: 10/22/97 (11 | 275)

End Of Thread





QUESTION:


Date: Tue Mar 5 06:50:11 PST 2002
Subject: 4L60E, Repeat planet failure within 100 miles
Vehicle: 1998 GMC SONOMA, 2.2
Mileage: 93000

PAST REPAIRS;

Original Customer Complaint: No movement. Rear planet, ring gear, sun gear, reaction carrier.

Original Codes Present: Code 1870

Previous Repairs: Complete overhaul, with clutches, seals, gaskets, sprags, planet, ring gear, sun gear, reaction carrier, sun shell, sonnax TCC regulator valve kit, solenoids, rebuilt converter.


REPAIRS THIS VISIT;

Current Customer Complaint: Same as before

Codes Currently Present: None

Work Completed: Disassemble unit and inspect shaft, lube holes, etc.. Nothing found blocked. Planet is gone again.

Summary: Could this be the cooler, or am I overlooking something else. Thanks for your help.

Mark Bowler -
bowler@midwest.net
TRNi Member Since: 9/18/00 (8 | 0)

RESPONSES:


UPDATE:


Date: Tue Mar 5 08:18:42 PST 2002
Subject: 4L60E, Repeat planet failure within 100 miles

I have checked the orifice in the pump and the seal under the sprag. Both are fine. I have assembled the pump with the clutch units and the output shaft on the bench. Using air pressure there is good flow coming from the pump out to the output shaft. The converter was and HZ, that is the same that came out. The planet came from WIT. I haven't had any problems with there planets lately. The planet is black, so I feel it is a lube problem somewhere. Thanks for the help so far.

Mark Bowler -
bowler@midwest.net
TRNi Member Since: 9/18/00 (8 | 0)

MORE RESPONSES:



FIX:


Date: Thu Mar 7 17:44:01 PST 2002
Subject: 4L60E, Repeat planet failure within 100 miles

Bypassed cooler and installed a external Tru-cool. So far so good. The customer stopped by today and said it is doing great. After inspecting everything else, I feel this was the fix. Thanks for all the help!

Mark Bowler -
bowler@midwest.net
TRNi Member Since: 9/18/00 (8 | 0)

End Of Thread





QUESTION:


Date: Tue Mar 12 12:23:29 PST 2002
Subject: 4L60E, drops out of od and third back to second
Vehicle: 1993 chevrolet 1500, 5.7
Mileage: 173780

PAST REPAIRS;

Original Customer Complaint: intermittetly dropping out of od into second

Original Codes Present: no codes

Previous Repairs: rebuilt put solenoids pump planetaries at 163620 miles


REPAIRS THIS VISIT;

Current Customer Complaint: dropping out of od down to second or first at 40 to 60 mph pull over on side of road trans works right for a little bit then back to the same thing

Codes Currently Present: no codes

Work Completed: hooked up snap on scanner no codes hooked up transx showed calling for 2nd sometimes or 1st sometimes

Summary: drove truck downshifted while in od to second pulled over and stopped vehicle completely trans worked good for a while then downshifted again around 50 mph trans was rebuilt 10,000 miles ago need help if possible

Rick Taylor -
rickstrans@simplecom.net
TRNi Member Since: 9/28/99 (2 | 0)

RESPONSES:



FIX:


Date: Wed Mar 20 14:20:21 PST 2002
Subject: 4L60E, drops out of od and third back to second

Customer installed used computer haven't heard from him in a week assume it is fixed

Rick Taylor -
rickstrans@simplecom.net
TRNi Member Since: 9/28/99 (2 | 0)

End Of Thread





QUESTION:


Date: Thu Mar 21 10:12:38 PST 2002
Subject: 4L60E, none yet
Vehicle: 1994 chevrolet 20 series 2wd van, 5.0
Mileage: 74,000

PAST REPAIRS;

Original Customer Complaint: #rd gear starts

Original Codes Present: sol. B code

Previous Repairs: Replaced shift solenoids both A&B and manifold pressure manifold switch


REPAIRS THIS VISIT;

Current Customer Complaint: 3rd gear starts

Codes Currently Present: sol. B and once had quad driver B

Work Completed: Hooked tranx, pressure gauge and snappy up drove 4 hours pressures normal everything worked fine. The van is a vendors they load it with 50 cases pop and boom failsafe.

Summary: Every time after we worked on this van I would hook everything [tranx, snappy, pressure gauge] everything would read fine, I told them it must only happen loaded and they loaded it sure enough the van doesn't even have to move and I can watch it go to failsafe clear codes watch the scanner with-in 5 sec. failsafe and we get a code for sol. B circuit I assume the circuit has a problem and yes I am going to hook tranx to it and measure resistance on the B cir. and at the computer but I don't understand why it has to be loaded.By the way a case of pop is 21 lbs so were only talking about 1000 lbs

Bud Tegeler -
tegtrans@essex1.com
TRNi Member Since: 5/14/98 (8 | 32)

RESPONSES:



FIX:


Date: Fri Mar 22 14:59:01 PST 2002
Subject: 4L60E, none yet

It took a while to find the computor, under the drivers seat, but it makes wire checks easy with the doghouse removed. I put an ohm meter on the sol. a&b circuits they were the same had my brother watch and I pulled and twisted wire harness thinking surely it was wires just before the computor but meter never moved. My brother went and borrowed a computer from the local yard ,we went for drive and as soon as it went limp I tried clearing codes and it went right back, put the borrowed unit on and problem dissapeared. Why it only did it with weight I don't know. Ordered a new computer but for now it's working fine with the used one. Just a side note the van squated almost 2 inches with a skid of pop, Thanks everyone Bud

Bud Tegeler -
tegtrans@essex1.com
TRNi Member Since: 5/14/98 (8 | 32)

End Of Thread





PROBLEM / FIX:


Date: Mon Apr 1 02:49:51 PST 2002
Subject: 4L60E, P1870
Vehicle: 1998 Chevrolet Astro

Problem / Fix: Group- Had a van this past week...61,000 miles..would set a P1870 code after about 10 miles of hard driving. TFT was 150*F or more, and tcc slip would climb to 400+ with tcc pwm duty cycle maxed. Pressure test was good(65# mainline and pressure rise was clean and smooth.) On a dare, I inspected the pan and filter..(clean as a whistle) Then, I dropped the v.b. and installed the Sonnax -04k kit,along with a new filter and fluid. The tcc regulator bore was worn badly! Test drove the vehicle for over 100 miles, and now tcc slip is NEVER over 50 rpms at anytime,..even with TFT above 175*F. The 400+ tcc slip rpm really made me think there had to be a deeper problem, but I was amazed at the fact that the Sonnax kit fixed it so well. Thank You, Sonnax! This EC3 system (woven lining) is some tough stuff! The customer was DELIGHTED that we were able to save them money,..(yes.. I explained that something else COULD go wrong with the tranny later,and this was a fix for a specific concern.) BUT..they sure liked the fact they did'nt have to overhaul the trans. at this time! Again, Thanks Sonnax! Joey Campbell

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (1 | 237)

RESPONSE TO FIX:

Date: Mon Apr 1 06:59:27 PST 2002
Subject: RE: P1870

Joey: Question...is the Sonnax valve redesigned or have some improvements to keep this from happening again in another 61K miles?

Larry Bloodworth - Certified Transmission & Drivetrain Clinic
larrybloodworth@hotmail.com
TRNi Member Since: 9/26/97 (13 | 65)

RESPONSE TO FIX:

Date: Tue Apr 2 03:17:51 PST 2002
Subject: RE: P1870

We feel it will just last another 60k and so we use the sk kit and paper tc.

Chuck Stasny - 0
cdsstaz@wt.net
TRNi Member Since: 12/7/2001 (2 | 22)

UPDATE BY AUTHOR:

Date: Tue Apr 2 04:40:04 PST 2002
Subject: RE: P1870

Hi Larry- I think Seth answered your question, but let me ask you .... How long is this tranny supposed to last? Remember, this was a REPAIR...NOT an overhaul. Yes, I realize that the reaction shell may break tomorrow,or the pump bushing may collapse and start leaking like a sieve,or the rear planet bearing may fail,............................. etc,... but then, even if I did overhaul it for this P1870, the replacement torque converter that I might have used COULD explode in, say 10,000 miles. Then who gets to pay? The point I was trying to make was that I could not believe the amount of tcc slip BEFORE the Sonnax fix,and that the woven lining in the t.c. could withstand such slippage and still be able to maintain the desired amount of controlled slippage once the Sonnax 04K kit was installed. Glad to see you're back active on TRNi.

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (1 | 237)


End Of Thread





QUESTION:


Date: Tue Apr 2 17:34:11 PST 2002
Subject: 4L60E, No forward engagement
Vehicle: 1996 Chevrolet Suburban 4X4, 350
Mileage: 155,000

PAST REPAIRS;

Original Customer Complaint: Slipping real bad in forward gears.

Original Codes Present: 1870 TCC slip

Previous Repairs: Periodic servicing only -pan drops-filter changes.


REPAIRS THIS VISIT;

Current Customer Complaint: No forward engagement-reverse is fine.

Codes Currently Present: None

Work Completed: Pressure checks and line rise all within normal range.

Summary: I rebuilt this trans-installed an Aceomatic super kit, pressure switch, position switch, force motor, and all solinoids-all oem. Replaced the convertor with an Aceomatic house brand. The only reference I can find to this problem is in the ATSG manual which points to a stator roller clutch not holding inside the torque converter. Any help greatly appreciated. Thanks in advance. Respectfully submitted, Loren Knighton Woodland, CA.

Loren Knighton -
backncardr@aol.com
TRNi Member Since: 4/23/97 (2 | 3)

RESPONSES:



FIX:


Date: Thu Apr 4 17:13:34 PST 2002
Subject: 4L60E, No forward engagement

Finally got this trans back from the shop that installed it. Lo and behold on teardown I find that I had left out the input sun gear. The trans works fine now. Feeling real stupid here. I would like to thank all the builders that took their time to help including Dan Tucker who kindly posted a page from his Trans Doc program. In my case builder's blindness should have been at the top of that list. :-/ Respectfully submitted, Loren Knighton Woodland, CA.

Loren Knighton -
backncardr@aol.com
TRNi Member Since: 4/23/97 (2 | 3)

End Of Thread





QUESTION:


Date: Thu Mar 28 14:32:36 PST 2002
Subject: 4L60E, Converter not releasing
Vehicle: 1995 Chevrolet Sanoma, 2.2
Mileage: 72,539

PAST REPAIRS;

Original Customer Complaint: Shutter type feel when slowing down

Original Codes Present: 69

Previous Repairs: Complete Overhaul, Converter, wiring harness w/solenoid. Converter still does not unlock when stopping, pressing brakes, etc. Once stopped, and engine killed, will start-up and take off just fine. Or, you can pull it into manual low and then back to OD and take off just fine. Cannot find any stuck valves. Have even tried another harness c/solenoid. Anyone else seen such?


REPAIRS THIS VISIT;

Current Customer Complaint: Same as before

Codes Currently Present: 69

Work Completed: Recheck previous work.

Summary: Computer is commanding TCC off, according to scanner.

Felix Turner III -
felixt3@charter.net
TRNi Member Since: 8/4/00 (1 | 1)

RESPONSES:


UPDATE:


Date: Sat Mar 30 05:22:52 PST 2002
Subject: 4L60E, Converter not releasing

Went into again - cannot find a valve sticking, pump or valve body. Went to the Olds/Cad/Buick/Chevy dealership (where I work at times since 1984) so my buddies could hook-up the Tech 2. We drove and commanded Converter on ourselves, that was fine, just as the computer does it, but we could not command it off. It stated that it was off, but was not. It is appearing to me that once the apply valve in the pump is moved to the apply position, then perhaps pressure from some other source is keeping the valve "applied," even though the solenoid has "dumped" the apply pressure. Any thoughts? Thanks in advance.

Felix Turner III -
felixt3@charter.net
TRNi Member Since: 8/4/00 (1 | 1)

MORE RESPONSES:



FIX:


Date: Thu Apr 4 18:17:57 PST 2002
Subject: 4L60E, Converter not releasing

Apparently, the TCC valve in the pump was worn. Although I could duplicate it sticking, nor see any wear in the pump, a new pump fixed the problem. Thanks for everyones help ... Felix

Felix Turner III - Turner's Transmission Service
felixt3@charter.net
TRNi Member Since: 8/4/00 (2 | 1)

End Of Thread





QUESTION:


Date: Mon Mar 25 17:54:30 PST 2002
Subject: 4L60E, goes to neutral when you let off the gas
Vehicle: 1993 Chevy G10, 4.3
Mileage: 68,000

PAST REPAIRS;

Original Customer Complaint: looses 4th or 3rd when you let off the gas feels like it drops in to neutral if you give it gas it revs up then kicks back in to 3rd then up to 4th

Original Codes Present: No codes

Previous Repairs: van was at a high school shop class and got taken apart there i received it when they could not get it to work at all corrected all the misplaced parts but didn't see any thing that would cause it


REPAIRS THIS VISIT;

Current Customer Complaint: Same

Codes Currently Present: None

Work Completed: Transmission out of van from previous shop would have liked to checked pressure first

Summary: Any help would be appreciated

Ken Schultz - NIAGARA TRANSMISSION
ktsenterprises1@hotmail.com
TRNi Member Since: 07/31/2001 (4 | 6)

RESPONSES:


UPDATE:


Date: Wed Mar 27 04:03:34 PST 2002
Subject: 4L60E, goes to neutral when you let off the gas

I put trans back in to van to get pressure readings 60 idle 80 rev 120 when you are driving down the road in 4th at 55. what is happening is if you let off the gas pressure drops to 60 then when you give it gas it seems to be in 2nd pressure rises to 120 then it shifts to 3rd then 4th pcs stays the same only changes a few tenths of an amp tried a new pcs with the screw turned 1/4 turn didn't help seems to be a pump problem or a large leak internally.

Ken Schultz - NIAGARA TRANSMISSION
ktsenterprises1@hotmail.com
TRNi Member Since: 07/31/2001 (4 | 6)

MORE RESPONSES:



FIX:


Date: Sun Apr 7 15:37:33 PDT 2002
Subject: 4L60E, goes to neutral when you let off the gas

Tore trans down could not find any problems went through valve body all ok checked out shift solenoids were two different kinds and the orifices were different sizes replaced solenoids all ok now it's never any fun when you get one that someone else has Ben in to and not getting all the information from the begining.

Ken Schultz - NIAGARA TRANSMISSION
ktsenterprises1@hotmail.com
TRNi Member Since: 07/31/2001 (4 | 6)

End Of Thread





PROBLEM / FIX:


Date: Thu Apr 11 12:43:09 PDT 2002
Subject: 4L60E, SPX "The Beast"
Vehicle: n/a GM 700R4 & 4L60E

Problem / Fix: Recently there has been some concerns regarding SPX part #42298B "The Beast". The concern has been that the neck of the beast is coming in contact with the Low/reverse inner sprag race. We have seen this happen in a few isolated cases. To date we have sold over 9000 and have heard of this situation in 3 cases. When developing this part our tech department had taken a Proto type and installed into a transmission and performed extensive Dyno testing, and remove shell for inspection with no problems found. This same shell was installed into a vehicle June 2001. Earlier this week we removed this shell for inspection and there was no signs of contact. There are many factors that help contribute to the concern, I will cover each of them. Issue 1: When the shell was designed the clearance in the area of the neck of the shell and the Inner race of the sprag was designed to be .010". One factor that is coming into play is many of the Inner sprag race very in size as much as .008". Issue 2: The outer contact area between the sprag assembly and the case has a tendency to wear, causing the sprag assembly to be "Off Center" when installed again reducing the clearance on one side of the neck to inner sprag race. Issue 3: This is the one that is directly related to each of the 3 concerns that we have seen. In each rebuild the Technician did not replace the inner bushings of the Sun Gear. This shell, as all transmission parts, is designed to run in a center line. If the bushings are worn the shell will be able to move off center line and come in contact with the inner sprag race. Bushings should always be replaced. Recommendation: During the rebuild "always replace all of the gear train bushings. Check the clearance between inner sprag race and neck of the sun shell, in some cases remove some material from the top half of in inner part of the sprag race. As always, SPX Filtran stands behind their products and is concerned with any issues regarding the products. I would expect anyone who has issues with our products to contact us. We are extremely receptive to feedback! Best regards, Thom Mendola AT Product Line Director SPX Filtran Aftermarket 15750 N.W. 59th Avenue Miami Lakes, FL 33014 Tel: 305-418-5282 Fax: 305-592-7543 The information contained in this electronic mail transmission is intended By SPX Corporation for the use of the named individual or entity to which it is directed and may contain information that is confidential or privileged. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email or call the SPX Help Desk at 215-293-2811 so that the sender's address records can be corrected.

Thom Mendola - 0
thom.mendola@filtran.spx.com
TRNi Member Since: 04/09/2002 (0 | 0)

End Of Thread





PROBLEM / FIX:


Date: Tue Apr 16 04:07:31 PDT 2002
Subject: 4L60E, codes 102 and 340 after overhaul
Vehicle: 1997 Chevy Astro van

Problem / Fix: Van came in with the usual 1870 code. After overhaul, code 102 (Mass air flow sensor) came up instantly and wouldn't clear. Scanner read O from that sensor. Also code 340 (Cam sensor) would set on driving. Vehicle would stall on corners sometimes. I read database about a wire harness from dist being caught it bellhousing, but that was not the problem. The electrical shop found that an O2 sensor (left front, we were told) had shorted and blown an ecm fuse. The strange thing was that the maf sensor had 5 volts coming to it and signal coming out of it when we checked it prior to sending it to electrical shop. At least it is fixed. Our r/r guy remembered that this same scenario had occurred to us on a same type van about a year ago, but couldn't remember the fix for that one. I suspect that the O2 sensor was the cure on that one also.

David Jayne - Bay Trasnsmission
stevewitt9@hotmail.com
TRNi Member Since: 5/11/98 (2 | 0)

End Of Thread





QUESTION:


Date: Mon Mar 18 21:13:39 PST 2002
Subject: 4L60E, LATE 2-3 ON HARD HARD THROTTLE AND HOLDS
Vehicle: 1998 Chevy CK1500 4X4, 350
Mileage: 68000

PAST REPAIRS;

Original Customer Complaint: NO REVERSE, OD OR SECOND

Original Codes Present: NO CODES

Previous Repairs: DONE 1 YEAR AGO COMPLETE OVERHAUL. CLUTCHES, BAND, SEALS, GASKETS, SUN SHELL, SPRAG, SONNAX TCC REGULATOR VALVE KIT, & CONVERTER


REPAIRS THIS VISIT;

Current Customer Complaint: DRIVES GREAT UNDER NORMAL ACCELERATION. HARD ACCEL. LATE 2-3 SHIFT, ALSO NOTICED THAT 3-2 KICKDOWN ON HIGHWAY HOLDS RPM AND SPEED UNTIL YOU LET OFF THE GAS.

Codes Currently Present: NO CODES

Work Completed: REMOVED PAN AND INSPECTED SOLENOIDS. EVERYTHING LOOKS AND CHECKS FINE. COULD THIS BE A TPS SENSOR OR 3-2 CONTROL SOLENOID?

Summary: JUST STARTED ALL OF THE SUDDEN DOING THIS LAST WEEK.

Mark Bowler -
bowler@midwest.net
TRNi Member Since: 9/18/00 (9 | 0)

RESPONSES:



FIX:


Date: Fri Apr 19 05:41:48 PDT 2002
Subject: 4L60E, LATE 2-3 ON HARD HARD THROTTLE AND HOLDS

Sorry for the long delay in the response. The customer finally called back to let us know that the fuel filter cured the problem. Thanks for all of your help.

Mark Bowler -
bowler@midwest.net
TRNi Member Since: 9/18/00 (9 | 0)

RESPONSE TO FIX:

Date: Sat Apr 20 06:37:05 PDT 2002
Subject: RE: 4L60E, LATE 2-3 ON HARD HARD THROTTLE AND HOLDS

Sorry guys, maybe I didn't sign my post.The reason I asked if this is the Real fix was that like some of the problems that happen south of the border this is not one that I see or hear of. I have been building for over 20 years and we run a techline and I never heard of this.It's just like the pumps on the AX0DE that they say explode.It must be serious problem if somebody goes though the trouble of making a replacement pump(Roslin).You learn something new every day.Once again I am sorry for not being a believer. Thank you and I'll keep my I out for this one. CJ

CJ of-Canada -
info@transtechca.com
TRNi Member Since: (4 | 32)


End Of Thread





QUESTION:


Date: Mon Apr 22 10:58:39 PDT 2002
Subject: 4L60E, Repeat case failure
Vehicle: 93 Chev 1/2 ton, 6.2
Mileage: n/a

PAST REPAIRS;

Original Customer Complaint: Leaking

Original Codes Present: None

Previous Repairs: Replaced case , broken at ext


REPAIRS THIS VISIT;

Current Customer Complaint: Leaking

Codes Currently Present: None

Work Completed: replaced case

Summary: This guy keeps breaking the case, wasn't there a TSB on this,some thing about a stabilizer bar running from the bell hsg to the transfer case? CJ

CJ of-Canada -
info@transtechca.com
TRNi Member Since: (5 | 36)

RESPONSES:


UPDATE:


Date: Mon Apr 22 13:32:02 PDT 2002
Subject: 4L60E, Repeat case failure

Thanks for the intel guys,I will have the guy check the slip yoke. I'm sorry I didn't mention the it is a 4x4.

CJ of-Canada -
info@transtechca.com
TRNi Member Since: (5 | 36)

MORE RESPONSES:



FIX:


Date: Thu Apr 25 16:41:55 PDT 2002
Subject: 4L60E, Repeat case failure

Thank you for all who responded.It was the slip yoke(frozen) I completely for got about that from my r&r days.Thanks again guys,what a great network! Keep up the good work! CJ

CJ of-Canada -
info@transtechca.com
TRNi Member Since: (5 | 41)

End Of Thread





QUESTION:


Date: Wed May 1 08:32:41 PDT 2002
Subject: 4L60E, converter clutch shudder osilates
Vehicle: 1999 chevy tahoe, 350
Mileage: 95k

PAST REPAIRS;

Original Customer Complaint: no reverse

Original Codes Present: none present

Previous Repairs: rebuilt unit w/all knew electronics a shell and the sonax 04 valve body kit


REPAIRS THIS VISIT;

Current Customer Complaint: converter shuder osilates on and off

Codes Currently Present: none

Work Completed: we have already replaced the converter twice, running this truck at 50 mph w constant throttle this shudder comes on when duty cycle goes to 45% and slip goes down to 10 rpm or less then duty cycle drops to 40% slip goes to aprox 100 rpm and the shudder goes away do we have a bad converter or did we install the regulating vale kit in wrong? pressures look good w/ 90 psi at constant throtle 20% tps and 50 mph.

Summary: dont know if this car had shudder before repairs but with no codes i assume not

Andy Dietzel -
adietzel@fullnet.net
TRNi Member Since: 01/22/2001 (10 | 3)

RESPONSES:



FIX:


Date: Thu May 2 16:47:11 PDT 2002
Subject: 4L60E, converter clutch shudder osilates

well after 2 precision converters and a valve body swap we still had shudder, so ireinstalled the original vb w the sonnax-04 valve kit already in it and put in a GM reman torque converter which fixed the shudder. Thanks to all for the help. AD

Andy Dietzel -
adietzel@fullnet.net
TRNi Member Since: 01/22/2001 (10 | 3)

RESPONSE TO FIX:

Date: Fri May 3 04:15:00 PDT 2002
Subject: RE: 4L60E, converter clutch shudder osilates

Last month I was at Showpower in Kansas and when I visited the Precision booth, they had a microscope to allow you to look at the GM woven linning. Great view of what looked like a good clutch until you looked through the microscope. You could see the woven fibers freying and comming apart. I specificly ask if they were still using the believed good clutches. He replied that that was the only way they could be rebuilt. But, we are working on a replacement that should be out soon. I gues some of you have been test pigies. Oink Oink

Chuck Stasny -
cdsstaz@wt.net
TRNi Member Since: 12/7/2001 (3 | 26)

RESPONSE TO FIX:

Date: Sun May 5 07:23:11 PDT 2002
Subject: RE: 4L60E, converter clutch shudder osilates

Let me start by saying we do use Precision converters but mainly on Fords because they are so much cheaper than DACO's. So we have not had a GM problem. I can say that I was confused with Dennis Hansen's first reply and sent him a personal email to clarify - he responded promptly and believable. To date, our experience with Precision has been very good but we use SK and paper Gm converters so we have not had an experience as Tranibob has described. I still see a major flaw in how precision has handled. When you are dealing with customers (like us)you can't sell junk and get away with it for very long - but they know that. I am sure they wanted to be the 1st supplier that solved the GM problem. And in their zeal to rectify, they did not do enough testing/evaluation. They did a poor job comunicating to their customers what they were doing and which converter had which lining. TALK ABOUT AN UNCONTROLLED TEST. How in the hell could you possible evaluate the results. I don't know if they have the answer this time but I think they have figured out that more controlled testing is required and hopefully they will inform the trans community if we are to become little test piggies again. I hope they will handle defferently if given the chance.

Chuck Stasny -
cdsstaz@wt.net
TRNi Member Since: 12/7/2001 (3 | 28)

RESPONSE TO FIX:

Date: Mon May 6 10:57:56 PDT 2002
Subject: RE: 4L60E, converter clutch shudder osilates

This is an interesting post in that ATC has already done a redesign on the tc woven fiber clutch for the GM Applications. I cannot divulge exactly how we were able to go around the patent, but we were. In all GM applications that have a woven fiber clutch, we now have either reused the original or have replaced the old woven fiber clutch with a new CARBON WOVEN FIBER CLUTCH. We have had no performance issues to date with this material, and it closely matches the OEM design, of course, without infringing on the patent. This was 2 years in the redesign process, and is only available on ATC torque converters. We, also, were not satisified with the kevlar and/or carbon impregnated paper material and so started the redesign process. We have had some suppliers contact us for this material, but we have not shared it or sold it to anyone else to date. Mike Cargill Product Manager ATCDG nproduct@atcdg.com

Mike Cargill -
nproduct@atcdg.com
TRNi Member Since: 11/30/2000 (0 | 2)


End Of Thread





QUESTION:


Date: Thu May 9 06:10:33 PDT 2002
Subject: 4L60E, Bumps on take-off
Vehicle: 99 Chevy Silverado 4x4, 5.3L
Mileage: 12,477

PAST REPAIRS;

Original Customer Complaint: Bumps on take-off

Original Codes Present: No codes(Mastertech and Snap-on)

Previous Repairs: Back to dealer 4 times.No parts replaced,could not duplicate customer complaint.


REPAIRS THIS VISIT;

Current Customer Complaint: same as above

Codes Currently Present: none(Mastertech and Snap-on)

Work Completed: Test drive, verified complaint.

Summary: Group- This truck will occasionally "bump" on takeoff from a stop. I am fairly sure it is the rear driveshaft yoke binding on the output splines.Does anyone have the GM "fix" for this? I lubed the yoke splines with Ford teflon grease and it seems fixed for now, but I would like to have another route to take in case this does'nt last. Thanks!

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (2 | 262)

RESPONSES:



FIX:


Date: Mon May 13 05:55:11 PDT 2002
Subject: 4L60E, Bumps on take-off

Group- Thanks for ALL the input on this. I cleaned and lubed the output splines with Ford Teflon grease, part# D2AZ-19590-A, and all is well now. The nickel-plated yoke part# is recorded,and the customer was advised that this may be required if the problem returns. Is this a real fix? I think so...at least for now.

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (2 | 264)

End Of Thread





PROBLEM / FIX:


Date: Fri May 17 21:18:48 PDT 2002
Subject: 4L60E, P1875 Shifts to soon and no kickdown
Vehicle: 1999 Chevrolet Blazer

Problem / Fix: Group, This one was a 1st for us, so I thought I would post it in case it is a repeater problem. The vehicle a 1999 Chevrolet Bazer 4.3 engine 4L60E transmission and the automatic transfer case, came in with all the upshifts a bit quick and getting into 4th at about 30 mph at light-normal throttles. As soon as it hits 4th you can give it a WOT and it will not command a downshift as it keeps commanding 4th. All the input data looked good at 1st. We scanned the ATC Transfer case codes and found a P1875 (4WD Low Circuit Problem). Now this lead us to monitor the 4WD Low data on the scanner. The scanner was showing 4WD Low in all ranges. Now it is making sense as to why the quick upshifts and no commanded downshifts. Keep in mind the transfer case was NOT in 4WD Low. And the transfer case works great and goes into all modes. It is just the VCM 'thinks' the transfer case is in 4WD Low, so it is responding with a 4WD Low shift timing and kickdown strategy. The TCCM (Transfer Case Control Module) is located behind the passenger side kick panel. In the Blue connector of the TCCM we had to locate the F7 (gray/black wire) that runs to the VCM's C4 pin 23. The TCCM is suppose to be open until the TCCM has placed the transfer case into 4WD Low range, in which at that time it sends a ground to the VCM pin 23 on the gray/black wire. In our case we cut the TCCM F7 gray/black wire at the TCCM to find the wire coming from the TCCM was grounded all the time. We replaced the TCCM ($355.38 WOW) and the problem is solved. Fix was to replace the Transfer Case Control Module.

Dan Tucker - Tucker's Transmission
transman@prodigy.net
TRNi Member Since: 4/23/97 (2 | 242)

End Of Thread





QUESTION:


Date: Sat May 18 07:04:34 PDT 2002
Subject: 4L60E, Same exact symtoms.
Vehicle: 1993 chev S-10 Pick-up, 4.3
Mileage: 75,000

PAST REPAIRS;

Original Customer Complaint: Vehicle had hard shifts into drive and reverse. Also harsh 1-2 shift. Obvious high line pressure.

Original Codes Present: Scanned vehicle, no codes present with Snap-on Scanner. Pcs amps showed approx. 1.03 amps at idle in neutral and desired in same range. Line pressure was 150lbs.

Previous Repairs: Assumed internal problem- complete rebuild new shift solenoids and PCS, clutches, band converter. Boost valve and valve body looked clean, no sticky valves.


REPAIRS THIS VISIT;

Current Customer Complaint: 150 lbs of line at idle in park. Borrowed Tech 1 tool to double check. No codes. Can move line pressure up by decreasing pcs amps with scanner but pressure will not drop below 150.

Codes Currently Present: Still no codes with Tech 1 or Snappy.Checked PCS ohms at Case connector- 5.0 System voltage 14.3

Work Completed: This is only visit, she's a never left. Am ready to start swapping valve body or pump even though they look perfect. This vehicle was a virgin when I got it.

Summary: Internal?

Edward Neal -
edward.t.neal@verizon.net
TRNi Member Since: 10/17/99 (1 | 10)

RESPONSES:



FIX:


Date: Sat May 18 09:40:45 PDT 2002
Subject: 4L60E, Same exact symtoms.

Joey, you are the MAN! I rapped on the PCM and the pressure instantly dropped from 150 to 75. New PCM is on the way, this is a genuine fix. Ed

Edward Neal -
edward.t.neal@verizon.net
TRNi Member Since: 10/17/99 (1 | 10)

RESPONSE TO FIX:

Date: Sat May 18 13:01:40 PDT 2002
Subject: RE: 4L60E EXACT SAME PROBLEM

Edward- Glad you got 'er fixed! But...Dan Tucker is the MAN....he posted this fix awhile back. I just remembered it because I had 2 pcm's do the same thing on '93-'94 4L60E's. Good Job!

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (2 | 271)


End Of Thread





QUESTION:


Date: Thu May 23 10:26:02 PDT 2002
Subject: 4L60E, no shifts no speedo
Vehicle: 1994 chevrolet camaro, 3.4l.
Mileage: 72000

PAST REPAIRS;

Original Customer Complaint: no shifts, no speedo

Original Codes Present: 24

Previous Repairs: na


REPAIRS THIS VISIT;

Current Customer Complaint: nos shifts no speedo

Codes Currently Present: 24

Work Completed: scanned and replaced vss, changed fluid/filter

Summary: which harness is the harness for transmission on ecm. problem i believe with #400 yellow wire from ecm to vss. any help out there???

Ronald Keeling -
tranzpro@aol.com
TRNi Member Since: 8/17/98 (23 | 4)

RESPONSES:



FIX:


Date: Thu May 23 14:44:10 PDT 2002
Subject: 4L60E, no shifts no speedo

yellow wire from ecm to vss had a break in it. repaired and shipped, thanks!

Ronald Keeling -
tranzpro@aol.com
TRNi Member Since: 8/17/98 (23 | 4)

End Of Thread





QUESTION:


Date: Tue Jun 4 21:15:05 PDT 2002
Subject: 4L60E, Slip only 2nd gear
Vehicle: 1993 CHEVROLET JIMMY, 4.3 L
Mileage: 126754

PAST REPAIRS;

Original Customer Complaint: Slip 2nd gear

Original Codes Present: No codes

Previous Repairs: Original, change filter and ATF mercon V


REPAIRS THIS VISIT;

Current Customer Complaint: Slip only 2nd gear at wot

Codes Currently Present: No codes

Work Completed: Change all solenoids, tps, o'ring, and band 2/4. The friction disc and plates is very good the OEM, New filter and ATF

Summary: The pressures: 2nd is 100 psi at 3000 RPM in speedway after 90 psi at 4000 RPM 0 psi at 5500 RPM. The other pressures is ok bad only 2nd gear.

Juan Carlos Mera Lopez - TECNICONTROL AUTOMOTRIZ
juanmera@hotmail.com
TRNi Member Since: 10/30/99 (7 | 16)

RESPONSES:



FIX:


Date: Wed Jun 12 18:56:18 PDT 2002
Subject: 4L60E, Slip only 2nd gear

Thanks for all helps. The fix the oil pump PSC bad, and wires socket transmission. The transmission is very good all shifts. Pressure with oil pump bad 64 all time Pressure with oil pump new and PSC 64 psi at 850 rpm and 130 psi at 4500 RPM Sorry my poor English. Thanks.

Juan Carlos Mera Lopez - TECNICONTROL AUTOMOTRIZ
juanmera@hotmail.com
TRNi Member Since: 10/30/99 (7 | 19)

End Of Thread





QUESTION:


Date: Thu Jun 6 06:05:59 PDT 2002
Subject: 4L60E, LINE PRESS ERRATIC HARSH 1-2
Vehicle: 96 chevy k-1500, 5.7L
Mileage: 120,000+

PAST REPAIRS;

Original Customer Complaint: HARSH 1-2 SHIFT

Original Codes Present: NO DTCS

Previous Repairs: GENERAL REBUILD.REPLACED CONVERTER,OVERHAUL KIT,BOOST VALVE,SOLENOIDS,NEW FORCE MOTOR(EPC)


REPAIRS THIS VISIT;

Current Customer Complaint: HARSH 1-2 SHIFT

Codes Currently Present: NO DTC'S

Work Completed: HAVE PUT NEW EPC,TPS,TRANSGO SK,TURNED PUMP,NEW ROTOR,SLIDER,VANES,SWAPPED COMPUTER,DIF AFL VALVE.1/4-1/2 THROTTLE PRESSURE WILL BE FINE,THEN IT WILL GO UP TO 180 THEN TO 0 VERY RAPPIDLY.3/4 TO WOT PRESS NORMAL AGAIN.

Summary: THIS VEHICLE HAS BEEN BACK TWICE.FIRST I SUSPECTED A WORN SLIDER.REPLACED W/GOOD USED PUMP/SLIDER, ROTOR ETC.ALSO FOR CMA PPURPOSES I PUT ANOTHER NEW EPC ON IT. WORKED FINE 2-3 DAYS.CAME BACK AGAIN SAME PROBLEM.TRIED SK ,TPS,SWAPPED COMPUTERS W/ANOTHER 96.TOOK IT BACK OUT.PUT A TURNED PUMP IN W/NEW SLIDER ,ROTOR, VANES.CHANGED AFL VALVE.STILL SAME PROBLEM.I KNOW THE PUMP ISN'T THE PROBLEM JUST AN AFTER EFFECT.ANY IDEAS? ANY HELP WOULD BE APPRECIATED, ALLAN

Jimmy Newman -
cttranny@aol.com
TRNi Member Since: 8/9/97 (2 | 1)

RESPONSES:


UPDATE:


Date: Thu Jun 6 16:43:20 PDT 2002
Subject: 4L60E, LINE PRESS ERRATIC HARSH 1-2

I would like to thank everyone that replied.I failed to mention in my first posting that this is a late 96. It has the jumper wire from the factory.We are installing another trans I rebuilt from a different 96 truck with the same trans code.As for this jumper wire has anyone experienced a problem with it? I will let you know how it goes tomorrow. thanks, Allan

Jimmy Newman -
cttranny@aol.com
TRNi Member Since: 8/9/97 (2 | 1)

MORE RESPONSES:


UPDATE:


Date: Fri Jun 7 16:09:16 PDT 2002
Subject: 4L60E, LINE PRESS ERRATIC HARSH 1-2

Well for all of you who have been following me so far.I went ahead and put the jumper wire on anyway. There were wires in the clear 18,blue 23,red26 ports. I removed them and put the jumper wire in there was no change.Over filled the unit to rule out suction problem.Still no change. Installed 1st trans in different 96 model vehicle took it on a short drive worked well.Will take it on a longer drive on monday w/guage.thanks for your replys. Allan

Jimmy Newman -
cttranny@aol.com
TRNi Member Since: 8/9/97 (2 | 1)

MORE RESPONSES:



FIX:


Date: Thu Jun 20 10:49:27 PDT 2002
Subject: 4L60E, LINE PRESS ERRATIC HARSH 1-2

Boost valve in pump. After 3 slides failed we finally hooked up the Tran X. When the pressure duty cycle was between 52% and 58% the pressure gauge would go crazy. We sit down together and go through everything we have done to this unit and realize the boost valve was the only common factor. It was a new valve and spring assembly, why doubt it? Anyway we replace the valve and pressure is back to normal. Again thanks to everyone that helped get our train of thought going in the right direction on this one.

Jimmy Newman -
cttranny@aol.com
TRNi Member Since: 8/9/97 (2 | 1)

End Of Thread





QUESTION:


Date: Sat Jun 29 11:12:02 PDT 2002
Subject: 4L60E, low line pressure
Vehicle: 1995 gmc pick up, 4.3
Mileage: 187000

PAST REPAIRS;

Original Customer Complaint: tail shaft housing broken when drive shaft broke

Original Codes Present: none

Previous Repairs: installed housing case bushing,band,pump,and drive shaft


REPAIRS THIS VISIT;

Current Customer Complaint: delayed engagement

Codes Currently Present: none

Work Completed: pressure is 25 lbs at idle pcs is at .96 i didn't remember to check the new pump i think that i might have gotten a non pwm pump . dose anyone know if that would cause low pressure?

Summary: none

Ken Schultz - NIAGARA TRANSMISSION
niagaratrans@msn.com
TRNi Member Since: 07/31/2001 (7 | 7)

RESPONSES:


UPDATE:


Date: Sat Jul 6 10:41:44 PDT 2002
Subject: 4L60E, low line pressure

I took back apart the pump that i put in was a modified 700 made to work for pwm 4l60e got another new pump installed it checked through trans. and valve body still has low line pressure about 20 psi followed oil flow charts and can't find the problem the filter is in the pump.

Ken Schultz - NIAGARA TRANSMISSION
niagaratrans@msn.com
TRNi Member Since: 07/31/2001 (7 | 7)

MORE RESPONSES:



FIX:


Date: Sun Jul 7 08:41:13 PDT 2002
Subject: 4L60E, low line pressure

Thank you all for the help it was the pump the last pump that was a real pwm unit came with all valves and filter. I found under the check valve spring they forgot to put a check ball I guess I'll tear all new ones apart and double check every thing. That would cause a large leak .

Ken Schultz - NIAGARA TRANSMISSION
niagaratrans@msn.com
TRNi Member Since: 07/31/2001 (7 | 7)

RESPONSE TO FIX:

Date: Sun Jul 7 10:08:36 PDT 2002
Subject: RE: 4L60E, low line pressure

Ken: This a good lesson for us all. I, too, have experienced what you have + more. You know those copper-colored checkball capsules that are in the back of the pump assembly? I have had some pumps with damage to those capsules and/or missing check balls. Also, I have had the plugs they cap off cross-drill access holes with missing or damaged on the OD/perimiter of the pump. Whenever I buy a 4L60E pump I always inspect it closely. I had one have no 3rd or 4th because of a missing plug in the perimiter of the pump. I'm not going to bash my supplier because they are a TRNi sponsor, but I think most suppliers have this problem because the people that actually handle the pump aren't knowledgeable transmission people.

Larry Bloodworth - Certified Transmission & Drivetrain Clinic
larrybloodworth@hotmail.com
TRNi Member Since: 9/26/97 (13 | 72)

RESPONSE TO FIX:

Date: Sun Jul 7 11:37:19 PDT 2002
Subject: RE: 4L60E LOW PRESSURE

Ken- Thanks for the fix! Man...don't you just hate SOME rebuilt pumps? I try to re-man all my pumps in house, but when I do need one, I have had great success with the Superior Super Pumps. Glad you got 'er fixed!

Joey Campbell - Campbell's Transmission Service
bccampbe@sitestar.net
TRNi Member Since: 4/6/98 (2 | 294)


End Of Thread





QUESTION:


Date: Thu Jun 20 16:34:31 PDT 2002
Subject: 4L60E, erratic vss on cicuit 437 only
Vehicle: 94 chevrolet 1500, 4.3
Mileage: 80000

PAST REPAIRS;

Original Customer Complaint: trans shifts erratic

Original Codes Present: none

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: erratic shifting

Codes Currently Present: none

Work Completed: i replced buffer and ecm

Summary: The speedometer has the correct speed and the signal going to the engine side of the ecm is correct, just the sinal going to the transmission side of the controller is erratic causing some early erratic od and lock up.

Steve Walker -
sdiswalker@msn.com
TRNi Member Since: 1/21/2002 (7 | 8)

RESPONSES:



FIX:


Date: Wed Jul 10 16:06:45 PDT 2002
Subject: 4L60E, erratic vss on cicuit 437 only

pinched wire after installing engine

Steve Walker -
sdiswalker@msn.com
TRNi Member Since: 1/21/2002 (8 | 8)

End Of Thread





QUESTION:


Date: Thu Jul 11 04:08:04 PDT 2002
Subject: 4L60E, no 3-2 down shift
Vehicle: 1995 gmc pick up, 4.3
Mileage: 150,000

PAST REPAIRS;

Original Customer Complaint: drive shaft broke

Original Codes Present: none

Previous Repairs: drive shaft,tail housing,3-2 solenoid,case bushing,pump[rotor broken].


REPAIRS THIS VISIT;

Current Customer Complaint: no 3-2 down shift

Codes Currently Present: none

Work Completed: scaned and watched data computer is comanding 2nd and 3-2 solenoid is going to 30% -40% depending how fast you are going

Summary: only happens when it gets hot works fine cold this was a concern before any repairs were made to trans .

Ken Schultz - NIAGARA TRANSMISSION
niagaratrans@msn.com
TRNi Member Since: 07/31/2001 (8 | 7)

RESPONSES:


UPDATE:


Date: Thu Jul 11 18:45:59 PDT 2002
Subject: 4L60E, no 3-2 down shift

line pressure at idle is 65 stall in drive is 180-190 hot checked power at trans connector when it was acting up had 14.1 volts it is stuck in 3rd after forced down shift i can manually down shift already totally went through valve body

Ken Schultz - NIAGARA TRANSMISSION
niagaratrans@msn.com
TRNi Member Since: 07/31/2001 (8 | 7)

MORE RESPONSES:


UPDATE:


Date: Sat Jul 13 04:08:38 PDT 2002
Subject: 4L60E, no 3-2 down shift

Dan it does shift down from 4th to 3rd it just won't go any further I'm replacing the 2 shift solenoids today I'm thinking that one of them I sticking when hot but electrically it is ok so it won't set code.

Ken Schultz - NIAGARA TRANSMISSION
niagaratrans@msn.com
TRNi Member Since: 07/31/2001 (8 | 7)

MORE RESPONSES:



FIX:


Date: Wed Jul 17 18:00:21 PDT 2002
Subject: 4L60E, no 3-2 down shift

Replaced valve body and all is cured . The only thing that i can think of is that a valve was binding when hot because i went through it two times and could not find a thing. Thanks to all who helped.

Ken Schultz - NIAGARA TRANSMISSION
niagaratrans@msn.com
TRNi Member Since: 07/31/2001 (8 | 7)

End Of Thread





QUESTION:


Date: Thu Jun 20 18:29:34 PDT 2002
Subject: 4L60E, erratic vss in the trans controller only
Vehicle: 94 chev 1500, 4.3
Mileage: 80000

PAST REPAIRS;

Original Customer Complaint: erratic shifting

Original Codes Present: none

Previous Repairs: complete overhaul


REPAIRS THIS VISIT;

Current Customer Complaint: erratic shifting

Codes Currently Present: none

Work Completed: replaced buffer and ecm

Summary: The signal going to the speedometer and the engine side of the ecm is good. The only signal with a problem is the trans controller reading.

Steve Walker -
sdiswalker@msn.com
TRNi Member Since: 1/21/2002 (8 | 8)

RESPONSES:



FIX:


Date: Sun Jul 28 07:41:48 PDT 2002
Subject: 4L60E, erratic vss in the trans controller only

there was a pinched wire upon installation of the engine.

Steve Walker -
sdiswalker@msn.com
TRNi Member Since: 1/21/2002 (9 | 8)

End Of Thread





PROBLEM / FIX:


Date: Tue Aug 6 18:12:01 PDT 2002
Subject: 4L60E, DTC P1870 and P0740
Vehicle: 2002 Chervolet Pickup

Problem / Fix: Group, I thought I would post my findings on this 2002 4L60E with a DTC P1870 and a P0740. The vehicle had onl;y 12,000 miles on it. The fail counter on the P0740 was 26 and the P1870 was 35. I couldn't find a way to link the 740 and the P1870 in any way. We went after the P0740 and found the solenoid to be out of range. We replaced it, and the P0740 cleared up, but the P1870 remained after just a few miles. The TCC duty cycle ramped quickly to 96% and the TCC slip was over 200 rpms while the enable was on. We removed the valvebody and replaced the TCC regulator valve lineup with the Sonnax K77754-03K. I talked to Greg at Sonnax and he told me that the 03K had a bit higher apply rate. It was perfect, and the TCC duty cycle was now steady at 40% with a TCC slip of about 20-50 rpms. So this is a double fix the solenoid fixed the P0740, and the Sonnax K77754-03K tamed the P1870.

Dan Tucker - Tucker's Transmission
transman@prodigy.net
TRNi Member Since: 4/23/97 (2 | 267)

End Of Thread





QUESTION:


Date: Mon Aug 5 17:16:27 PDT 2002
Subject: 4L60E, erratic line pressure
Vehicle: 1998 Chevrolet Suburban, 350
Mileage: 60000

PAST REPAIRS;

Original Customer Complaint: no movement

Original Codes Present: none

Previous Repairs: complete rebuild rear planet/sprag blown up Transgo Reprogamming kit.


REPAIRS THIS VISIT;

Current Customer Complaint: no movement

Codes Currently Present: none

Work Completed: we have rebuilt the pump, replaced the pump, replaced pressure switch, force motor tried different boost valves, installed the jumper wire in the cpu wiring harness,

Summary: the pressure fluctuates 100# it is worse in third gear 3/4 throttle, this vehicle has a supercharger and according to the owner it does not have a performance chip installed we have decreased the problem about 80% with the above repairs I believe the large fluctuation in the beginning caused the pump slide to break. Is there anything else I can do, the trans works fine and without a pressure gauge you wouldn't know anything woesn't right

Greg Boehm -
greg@valtran.com
TRNi Member Since: 5/21/97 (2 | 6)

RESPONSES:



FIX:


Date: Thu Aug 8 09:49:57 PDT 2002
Subject: 4L60E, erratic line pressure

1. We installed a .471" boost sleeve, we plugged all the feed holes in the sleeve (used #4 aluminum rivets cut very short) redrilled the lower hole to .049" and the upper hole to .032". That brought the pressure pulsation from 100# to 50# and narrowed the throttle opening width from let's say a foot down to 4"(the area where you could instill this action). 2. We drilled the oriface in the lockup solenoid to .086" and this brought the pulsation down to 25" and narrowed the throttle opening width down to 2". 3. We rcalibrated the dipstick as it was about an inch too low. 4. We used a OEM bumper spring and a Transgo RPG pressure regulater spring. 5. It's gone. 6. The above fixes were courtesy of Gil & crew. In response to other questions initially it came in with a broken rear one way clutch. 1 week later it came in with a broken pump slide.Two pumps and no difference.

Greg Boehm -
greg@valtran.com
TRNi Member Since: 5/21/97 (2 | 6)

End Of Thread





QUESTION:


Date: Thu Jul 18 13:12:39 PDT 2002
Subject: 4L60E, Shifts 2-Neutral/Failsafe Check Engine
Vehicle: 1999 Chevrolet S10, 4.3
Mileage: 41,000

PAST REPAIRS;

Original Customer Complaint: Transmission shifts 1-2,2-Failsafe

Original Codes Present: PO758, 2-3 Shift Solenoid Electrical

Previous Repairs: N/A


REPAIRS THIS VISIT;

Current Customer Complaint: Failsafe

Codes Currently Present: P0758, 2-3 Shift Solenoid Electrical

Work Completed: Replaced solenoid and internal harness. Performed GM TSB for Computer Ground Service Kit 12167310

Summary: Circuit #1020 E Pink wire has B+ at all times. Scanner shows 2-3 solenoid open only when shift is commanded.Scanner shows correct commands.

Michael Gebbia -
astrotrans@comcast.net
TRNi Member Since: 8/1/99 (2 | 0)

RESPONSES:



FIX:


Date: Fri Aug 9 10:53:02 PDT 2002
Subject: 4L60E, Shifts 2-Neutral/Failsafe Check Engine

I ran a seperate wire from the Computer to the solenoid with no change. Replaced the Computer and vehicle is like new. Please note I had recently read the Vehicle Warranty Booklet and it stated that the VCM was warranted for 8 Years 80,000 miles under Federal Law however my regular Chevy Dealer refused to warranty the VCM and I found another PROFESSIONAL Dealership which handled it no problem and thanked me for the business.

Michael Gebbia -
astrotrans@comcast.net
TRNi Member Since: 8/1/99 (2 | 2)

RESPONSE TO FIX:

Date: Sat Aug 10 03:42:49 PDT 2002
Subject: RE: 4L60E, Shifts 2-Neutral/Failsafe Check Engine

Good work Michael and thanks for bringing that to our attention. If it is 8 / 80 then I might also be able to save customers someoney and still get credit for a job well done. I wonder do all GM warranties state the 8 / 80? Guess I need to start going through glove boxes.:-)

Chuck Stasny -
cdsstaz@wt.net
TRNi Member Since: 12/7/2001 (5 | 81)


End Of Thread





PROBLEM / FIX:


Date: Mon Aug 12 19:32:35 PDT 2002
Subject: 4L60E, Body & Security DTCs & Gauges quit
Vehicle: 2002 Chevrolet Tahoe

Problem / Fix: I ran into this last week and thought it might help some of you be ready for what we experienced. We usually use the Tech2 on late madel GMs, but our data cord from the scanner has an open wire, and thus we used the Snap-on scanner on this 2002 Tahoe. We just fib'ed a bit and told the scanner it was a 2000 model. It worked fine no problems. The vehicle had a P1870 and we took a movie, found the problem to be a worn out VB TCC regulator bore. Scanner worked fine. I guess this TCC regulotor problem is never going to go away. We installed the Sonnax 77754-03K (we used it to give it a bit more volume of TCC apply oil). We filled the unit up and now we noticed that we have a check engine light on, and the guages quit working after about 3-5 seconds after startup. We checked the DTCs and there were body and security DTCs. Sorry I don't remember the DTC numbers. We are at a point of WHAT DID WE DO! It wasn't like that before we worked on it. After back tracking and thinking a bit, I just couldn't see where we could have caused it inside the pan. Just out of luck, I decided to pull the Snap-on scanner off the Data link connector and the problem was gone. Now I'm thinking what is different, as I know we took a movie with this before and had no DTCS and the guages worked fine. BINGO, I found it. We have a battery pack on our scanner. For some reason you have to have the battery pack on, on the 2002 Tahoe to keep it from freaking out the system. Every tiume we tried to scann the vehicle with the battery pack off, the DTCs and the guages quit. I hope this helps some of you to not be shocked and scared like we were. I thought we had messed the whole truck up. I suspect that if you hook the scanner up without a battery pack, you will have the problem we had. This could be another reason to buy the Snap-on battery pack for your scanner. It is the greatest on the non OBD2 vehicles as you don't haqve to fool with the cigarette lighter or cord.

Dan Tucker - Tucker's Transmission
transman@prodigy.net
TRNi Member Since: 4/23/97 (2 | 269)

End Of Thread





QUESTION:


Date: Thu Aug 22 07:09:26 PDT 2002
Subject: 4L60E, No 4th gear, no lu.
Vehicle: 1996 Chevy Suburban, 5.7
Mileage: 144567

PAST REPAIRS;

Original Customer Complaint: No 4th gear

Original Codes Present: Code 83 and code for 3-2 solenoid failure

Previous Repairs: Customer had transmission replaced by a repair facility in Texas approx. 1 year ago.


REPAIRS THIS VISIT;

Current Customer Complaint: No 4th gear and no lu

Codes Currently Present: code 83

Work Completed: Diagnosed code 83

Summary: A very long story short--veh came in with no 4th and no lu. Veh. titled as 95, door plate and epa cert both say 95. Had code 83 and code for bad 3-2 control solenoid.Technician tested solenoid and replaced. Code 83 came back immed. when ignition turned on. After much testing and hair pulling, vehicle harness was found to have 13 wires, but trans connector only had 12. Came to conclusion that prev. shop installed a non pwm transmission in a pwm vehicle. Have no clue on why problem was not immediately apparent. My tech installed a late harness and pwm solenoid with no o-rings so that it would just exhaust, and not toggle the converter plate. Customer traveling thru, does not have enough money to effect a proper repair (ie replacing unit with correct trans.) I'm concerned that the pwm solenoid oil pressure is still going to pulse the converter, which I assume has a standard lu plate installed. Has anybody had to do anything like this

Greg Wilburn - Wilburn's Transmissions Inc.
gregw@prairieweb.com
TRNi Member Since: 2/18/2002 (4 | 31)

RESPONSES:



FIX:


Date: Thu Aug 22 09:13:12 PDT 2002
Subject: 4L60E, No 4th gear, no lu.

Update and probable Fix for this vehicle. Took vehicle on long test drive. LU functions fine and releases on throttle app or brake app. Computer seems happy with the o-ring less pwm solenoid. Seems as long as the computer sees that pwm solenoid in the harness everything is good. Computer monitors tcc slip at -2 to -8 at steady 60mph. I have no idea how the customer has managed to put on 10,000+ miles without the code 83 and no 4th condition.

Greg Wilburn - Wilburn's Transmissions Inc.
gregw@prairieweb.com
TRNi Member Since: 2/18/2002 (4 | 31)

End Of Thread





QUESTION:


Date: Fri Aug 16 06:08:49 PDT 2002
Subject: 4L60E, 4l60-e intermitant neutral at stop
Vehicle: 98 gmc sonoma, 2.2
Mileage: 67,959

PAST REPAIRS;

Original Customer Complaint: vehicle came in 4 months/5,000 miles ago, no fwd. or rev.

Original Codes Present: n/a

Previous Repairs: complete rebuild,converter,input sprag


REPAIRS THIS VISIT;

Current Customer Complaint: neutrals at stop / intermitantly

Codes Currently Present: none

Work Completed: pressure test in drive at idle 60psi to 180psi w.o.t. r&r unit and inspect, no sign of slippage or wear. air check of forward clutch is good. input sprag looks good,but put new sprag, inner race and outer race. reinstall in truck, same problem

Summary: with truck on lift you can put into o/d or d and sometimes there will be no engagement, but if you pull it into 2 or 1 it engages and shifts fine. the next time you put into o/d or d it might engage and shift fine, however if you keep slight pressure on brakes and let it downshift it feels like it neutrals at downshift to second. then when wheels are stopped shifter still in o/d position you have neutral condition, it would appear that input sprag is not holding, but this is second one? any thoughts would be appreciated john troxell uniontown transmission service

John Troxell -
jt12035@aol.com
TRNi Member Since: 3/4/98 (1 | 0)

RESPONSES:



FIX:


Date: Wed Aug 28 11:58:40 PDT 2002
Subject: 4L60E, 4l60-e intermitant neutral at stop

pulled unit out, disassembled and did nothing but sand inner and outer input sprag races, reinstalled, worked fine. customer has had truck for 10 days now and reports no problem/everything fine. thanks to everyone who replied

John Troxell -
jt12035@aol.com
TRNi Member Since: 3/4/98 (1 | 0)

End Of Thread





QUESTION:


Date: Thu Aug 29 17:53:51 PDT 2002
Subject: 4L60E, NO shift to 4rth
Vehicle: 1996 CHEVROLET SILVERADO, 5.7L
Mileage: 100.000

PAST REPAIRS;

Original Customer Complaint: none

Original Codes Present: none

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: none

Codes Currently Present: the snappy doesn´t comunicate with the comp.

Work Completed: complete o/h

Summary: all other gears working perfect.

David Anidjar -
samuelyair@hotmail.com
TRNi Member Since: 06/25/2001 (14 | 4)

RESPONSES:


UPDATE:


Date: Thu Aug 29 18:31:32 PDT 2002
Subject: 4L60E, NO shift to 4rth

there are no codes,I don´t get any data parameters. on a lift it changes fine to 4th but not on a drive test. I havent take any pressures ,because is very late now ,but I would appresiate some advise for tomorrow. thanks to everyone David Anidjar.

David Anidjar -
samuelyair@hotmail.com
TRNi Member Since: 06/25/2001 (14 | 4)

MORE RESPONSES:



FIX:


Date: Sun Sep 1 21:03:51 PDT 2002
Subject: 4L60E, NO shift to 4rth

thanks to everyone. the fix was after checking the vb and finding nothing wrong whith it, i just tap on the 3rd acc check ball untill it got stack on its capsule and after putting it all together the transmission works great (it most had been leaking). thanks again.

David Anidjar -
samuelyair@hotmail.com
TRNi Member Since: 06/25/2001 (14 | 4)

End Of Thread





QUESTION:


Date: Tue Aug 27 12:44:01 PDT 2002
Subject: 4L60E, Code 1870
Vehicle: 1998 Chevrolet Van, 5.7
Mileage: 127000

PAST REPAIRS;

Original Customer Complaint: CEL on and hard shift.

Original Codes Present: 1870

Previous Repairs: diag 1870, removed and o/h,new conv,inner pump spring on l/u valve,cooler. Cleared codes. Ok Left for 4 days and came back for same problem. Removed v/b and installed Sonnax valve for l/u. Left for about 1 month and came back same problem. Replaced v/b with reman unit and same problem.


REPAIRS THIS VISIT;

Current Customer Complaint: 1870 still. Replace conv. again with woven instead of carbon clutch. Watching my trusty scanner I have TCC duty cycle of 96% in 1st gear and when TCC enables it slowly goes to zero. My TCC slip is around 300-400 RPMS. I have not seen TCC duty at 96% on any units before the TCC is enabled. Is this normal, and any help would be greatly appreciated. Thanks in advance.

Codes Currently Present: P1870

Work Completed: Replaced conv again with woven instead of carbon clutch and still same problem.

Summary: We have really researched this problem and thought I had done all that was necessary to repair but with no effects.

Alan Hutcheson - 0
hutcheson-racing@prodigy.net
TRNi Member Since: 8/15/2002 (1 | 0)

RESPONSES:



FIX:


Date: Tue Sep 3 21:30:04 PDT 2002
Subject: 4L60E, Code 1870

THANKS for all the great advice I received. I felt i had really done my homework on this one. Jeremy at Sonnax has a great article coming out in the new cataloge. He faxed it to me and it is very interesting reading. My fix on this one was to replace the TCC apply valve with the new one from Sonnax, with the teflon seal on it. Mine showed a little wear. Now all the numbers on the scanner jive with what they should be. Once again thanks. Alan Hutcheson Cottman Transmission Tupelo, MS

Alan Hutcheson - 0
hutcheson-racing@prodigy.net
TRNi Member Since: 8/15/2002 (1 | 8)

End Of Thread





QUESTION:


Date: Thu Sep 5 17:42:49 PDT 2002
Subject: 4L60E, late 1-2 shift when cold
Vehicle: 1994 chev 1\2 ton, 4.3
Mileage: 240594

PAST REPAIRS;

Original Customer Complaint: boiled oil out nom od

Original Codes Present: 051? trans over heated don,t remember code # for sure

Previous Repairs: replace torque clutches seals band reverse imput drum pump and trans cooler there was no flow through the rad


REPAIRS THIS VISIT;

Current Customer Complaint: late hirpm 1-2 shift when cold unless you back off on gas pedal then it shifts to 2ond.but if you accelerate it goes back to low.and then shifts 1-3.how ever once it has warmed up a little or has shifted a few times it works well shifts 1-2 2-3 3-4 and l/u ok. it does seem to have a slight hang up on the 2-1 down shift it seems to go down when you take off again

Codes Currently Present: ther are no codes pressent

Work Completed: i have replaced the manifold pressure with and also the force motor. tomorow will try valve bdy. any thoughts out there?

Summary: no other imfro. availasble its a dept of hiways trucks.any suggestions?

James Williams -
jaw@mb.sympatico.ca
TRNi Member Since: 8/21/99 (5 | 0)

RESPONSES:



FIX:


Date: Wed Sep 11 16:32:53 PDT 2002
Subject: 4L60E, late 1-2 shift when cold

the fix was in the valve body replaced it and the truck works fine.thanx to all those that replied.jaw

James Williams -
jaw@mb.sympatico.ca
TRNi Member Since: 8/21/99 (5 | 0)

End Of Thread





QUESTION:


Date: Thu Jul 11 11:20:24 PDT 2002
Subject: 4L60E, None
Vehicle: 2000 Chevy Blazer, 4.3
Mileage: 37,500

PAST REPAIRS;

Original Customer Complaint: 4WD engages without warning and is hard to disengage

Original Codes Present: No transmission codes transfer case has DTC 4

Previous Repairs: None


REPAIRS THIS VISIT;

Current Customer Complaint: Same

Codes Currently Present: Same

Work Completed: None, May Change TCCM. Quickly checked connections. Scanned and checked TCCM for codes.

Summary: Problem comes and goes. Goes into 4WD Low on its own.

Richard St.John - Transmissions To Go
tpartsxxiib@aol.com
TRNi Member Since: 6/20/99 (4 | 6)

RESPONSES:


UPDATE:


Date: Tue Aug 6 10:09:46 PDT 2002
Subject: 4L60E, None

Changed transfer case controller. No go! Updated Snap-on scanner and Mitchell Repair. I'm back at it, scanner still won't read transfer case information. Going to guess and try dash switch and MLP it tries to change modes by moving shifter.

Richard St.John - Transmissions To Go
tpartsxxiib@aol.com
TRNi Member Since: 6/20/99 (4 | 6)

MORE RESPONSES:



FIX:


Date: Tue Sep 17 07:18:44 PDT 2002
Subject: 4L60E, None

Dash switch and MLP took care of the problem. Dealer had parts in stock.

Richard St.John - Transmissions To Go
tpartsxxiib@aol.com
TRNi Member Since: 6/20/99 (4 | 7)

End Of Thread





QUESTION:


Date: Thu Sep 26 14:39:07 PDT 2002
Subject: 4L60E, slip in reverse
Vehicle: 1998 chevy 1500 4x4,
Mileage:

PAST REPAIRS;

Original Customer Complaint: Hard 1-2 and slippage

Original Codes Present: trans overheated code

Previous Repairs: Overhaul,all frictions,sunshell,band,converter,Tcc reg valve kit,filter,and checkball area sep plate repair kit,also new pump.


REPAIRS THIS VISIT;

Current Customer Complaint: hasnt left hoist

Codes Currently Present: none

Work Completed: pressure test shows about 55lbs in all ranges and will not rise

Summary: took back apart and looked at everything, everthing looks good and air checks. works good on hoist until vehicle is on the ground and reverse slips big time.

Jim Dillon -
transhop1@aol.com
TRNi Member Since: 1/14/2002 (2 | 4)

RESPONSES:


UPDATE:


Date: Thu Sep 26 15:52:19 PDT 2002
Subject: 4L60E, slip in reverse

My last post was actually an update, sorry about that I am not used to doing this. Jim

Jim Dillon -
transhop1@aol.com
TRNi Member Since: 1/14/2002 (2 | 4)

MORE RESPONSES:



FIX:


Date: Fri Sep 27 11:05:09 PDT 2002
Subject: 4L60E, slip in reverse

Took apart pump and could not find any problems. Installed a different pump and trans works great, although I still dont know what was wrong with the other pump as everything looked perfect and did not have a hung boost valve. I think I will use the superior pumps from now on. Thank you all very much, and the method of revving the engine and shutting off power is a great way to help narrow down problems. Thanks again, Jim Dillon

Jim Dillon -
transhop1@aol.com
TRNi Member Since: 1/14/2002 (2 | 4)

End Of Thread





QUESTION:


Date: Mon Sep 16 19:47:43 PDT 2002
Subject: 4L60E, 3rd gear starts
Vehicle: 1999 chevy s-10 blazer , 2.8
Mileage: 30,000

PAST REPAIRS;

Original Customer Complaint: starts in 3rd gear

Original Codes Present: none

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: starts in 3rd gear

Codes Currently Present: none

Work Completed: checked for codes,checked fuses,did wiggle test

Summary: customer told us truck worked fine he just did a routine service and when he was done this problem occured, we scanned it no codes dropped pan to check if he broke a wire etc. nothing wrong there, did a wiggle test on harness and nss, oh and we changed 3-2 downshift solenoid cause on scanner it read yes all the time, we also checked fuses, thats as far as we got today, like to know if anybody ever ran into this. thanks

Gregory Gaal -
gregg505@aol.com
TRNi Member Since: 3/27/00 (36 | 43)

RESPONSES:


UPDATE:


Date: Mon Sep 23 17:22:43 PDT 2002
Subject: 4L60E, 3rd gear starts

i thought i posted a fix on this one but anyway shift solenoids fixed it.

Gregory Gaal -
gregg505@aol.com
TRNi Member Since: 3/27/00 (37 | 43)

MORE RESPONSES:



FIX:


Date: Wed Oct 30 17:33:13 PST 2002
Subject: 4L60E, 3rd gear starts

sorry for the delay it was a shift solenoid. thanks to all for responding

Gregory Gaal -
gregg505@aol.com
TRNi Member Since: 3/27/00 (37 | 43)

End Of Thread





QUESTION:


Date: Thu Oct 31 06:33:48 PST 2002
Subject: 4L60E, forward clutch chatter, ok in manual low
Vehicle: 1993 Chevrolet Silverado, 5.0l
Mileage: 100095

PAST REPAIRS;

Original Customer Complaint: slipped bad in forward customer complaining of a noise which was the clutch chatter

Original Codes Present: code 72, speed sensor code

Previous Repairs: compleate o/h, cooler flush, codes cleared. replaced all solenoids, input sprag, epc, accumulator piston, hi energy clutches


REPAIRS THIS VISIT;

Current Customer Complaint: never left, chatters in forward only from a completed stop at medium throttle, fine in manual low, will make a banging noise when releasing throttle after having brake torque the vehicle

Codes Currently Present: code 72 speed sensor error

Work Completed: replaced force motor and condition is the same

Summary: forward clutches were burned out, metal to metal with no obvious cause

Michael Hines -
mike@bondedtransmission.com
TRNi Member Since: (1 | 0)

RESPONSES:



FIX:


Date: Thu Oct 31 09:46:28 PST 2002
Subject: 4L60E, forward clutch chatter, ok in manual low

Upon removal and disassembly the rebuilder identified that there was a hairline crack in the "input" drum around the area where the shaft goes through it. This builder apparently had never seen this and did not properly inspect it.

Michael Hines -
mike@bondedtransmission.com
TRNi Member Since: (1 | 0)

End Of Thread





QUESTION:


Date: Mon Nov 11 13:18:02 PST 2002
Subject: 4L60E, kills motor in 2nd code 67
Vehicle: 1994 gmc pick up, 5.7
Mileage: 150k

PAST REPAIRS;

Original Customer Complaint: slips

Original Codes Present: none

Previous Repairs: rebuild all sols. and t/c


REPAIRS THIS VISIT;

Current Customer Complaint: kills motor in 2nd

Codes Currently Present: 67 quad driver

Work Completed: truck drives ok with quick-test box

Summary: all of the books say to check voltage but has to be ground problem

James Carter -
nila2@aol.com
TRNi Member Since: 8/21/00 (5 | 9)

RESPONSES:



FIX:


Date: Mon Nov 11 13:22:10 PST 2002
Subject: 4L60E, kills motor in 2nd code 67

ground wire from computer e-10 to t terminal on trans grounded

James Carter -
nila2@aol.com
TRNi Member Since: 8/21/00 (5 | 9)

End Of Thread





QUESTION:


Date: Fri Nov 8 15:51:42 PST 2002
Subject: 4L60E, no first or fourth
Vehicle: 1994 Chevrolet S-10 4x4 Blazer, 4.3W
Mileage: 100935

PAST REPAIRS;

Original Customer Complaint: no first or fourth

Original Codes Present: 81- 2-3 shift solenoid circuit fault

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: same

Codes Currently Present: 81- 2-3 shift solenoid

Work Completed: Replaced both shift solenoids and 3-2 solenoid. External harness has over twelve volts going to pin E. Hooked up external test harness and was able to make both new solenoids click. Went through VB and replaced VB gaskets and both screens in seperator plate. There was no debris blocking solenoid feed holes.

Summary: There is another post in the fix database that is a mirror of my problem. The fix was to replace the 3-2 solenoid. I did that the third time I dropped the pan. This is aggravating!! The customer said that this happened when they were four-wheel driving. Fluid is in bad shape, but there wasn't anything unusual in the pan. This vehicle has 3rd gear starts unless the selector is placed in D2 or D1, then it has second gear starts. The scanner says it is commanding first no matter what selector position it is in, but there is no first. Please help me get this clunker out of my shop!!!!!!!

Taylor Rath -
tarat@earthlink.net
TRNi Member Since: 6/26/2002 (6 | 13)

RESPONSES:



FIX:


Date: Tue Nov 12 17:45:28 PST 2002
Subject: 4L60E, no first or fourth

It turns out that the yellow wire with the black stripe that the computer grounds to activate the 2-3 solenoid was open somewhere between the firewall and the bellhousing. I ran a new wire from the trans connector to the PCM and it fixed the no first and fourth complaint. Now I have all four gears and lock-up. It's hard to believe with how bad the fluid looked and smelled. Oh well. Thanks to all who replied, especially Tranibob. The repair manual you posted really helped! Thanks!!!!

Taylor Rath -
tarat@earthlink.net
TRNi Member Since: 6/26/2002 (6 | 13)

End Of Thread





PROBLEM / FIX:


Date: Sat Nov 16 04:30:40 PST 2002
Subject: 4L60E, Shudder or slip in Forward
Vehicle: N/A GM Bench

Problem / Fix: This is easy to overlook so if you get this complaint, especially if you have an earlier TransGo SK combined with the plastic Fwd Accum it could be cracked or completely broken. The later kits no longer change the Fwd Acc springs. The original setup worked fine with the Aluminum piston but the plastic doesn't. If you have an earlier kit in stock, skip the Fwd Acc changes. If working on a Trans that has the kit, install a stock spring on it. I have seen problems W/O the TransGo kit and the piston still can crack but this aggravates it.

Leo Schneggenburger -
lschneg1@rochester.rr.com
TRNi Member Since: 1/30/99 (7 | 511)

End Of Thread





PROBLEM / FIX:


Date: Tue Nov 19 19:26:14 PST 2002
Subject: 4L60E, Bad Vibration Like a Bad Rear U Joint
Vehicle: 2000 Chevrolet 4WD

Problem / Fix: Group, I thought I would share a near bone head mistake we almost made today. We had a 2000 Chevrolet full size 4WD (auto transfer case 246) come in with a complaint of a vibration. I took it for a quick test drive in 2WD range and it felt just like a bad rear U joint. We snatch the rear drive shaft out, and the joints are perfect. I told the guys to put the shaft back in and lets run it on the lift and visually check the rear drive shaft for being bent. We ran it at slow speed and it is straight as an arrow, so we run it up to about 60 where the vibration hit it's maximum and the rear shaft is true, BUT, we notice the front shaft is turning. Now here is where we almost goofed. We thought that something was wrong, and that the front shaft should be motionless in 2WD. With a little research I found out that the front drive shaft turns all the time. It is designed to turn, but no real torque is transferred through it, or in other words it slips under power. The clutches in the transfer case drag the shaft all the time. OK back to the vibration. It turns out that the bad vibration in 2WD High range is a bad U joint in the front drive shaft. So, be ready to think differently. Hope this will help in the future.

Dan Tucker - Tucker's Transmission
transman@prodigy.net
TRNi Member Since: 4/23/97 (2 | 318)

End Of Thread





QUESTION:


Date: Thu Nov 14 09:51:14 PST 2002
Subject: 4L60E, just wanted to know
Vehicle: 1998 GMC K1500, 5.7L
Mileage: 130,000

PAST REPAIRS;

Original Customer Complaint: Down at the Trans where the Harness plugs into the trans someone cut the tan & black wire, taped it all up & hid it inside the plastic wire conduit.

Original Codes Present: PO740

Previous Repairs: Someone else had built the trans aprox a year ago but they used a offshore planetary that dropped the bearing in the middle of it.


REPAIRS THIS VISIT;

Current Customer Complaint: none yet

Codes Currently Present: none

Work Completed: We are building a new unit HD and installing all the updates

Summary: The wire that they clipped is for the Torque Converter Clutch (TCC Sol.) Valve Control is how it is explained in Alldata. Has Anyone seen this before? The vehicle go in to us on the Hook and only had a PO740 Code.

Jeffery Funk -
shiftkit@specialtytrans.com
TRNi Member Since: 6/1/00 (9 | 40)

RESPONSES:



FIX:


Date: Wed Nov 20 15:27:51 PST 2002
Subject: 4L60E, just wanted to know

We soldered the snipped wire back together, installed the Power Relay while we did a complete Overhaul with all of the Goodies. Truck drove out great, Customer is Happy. We traced that wire down and found it to be the TCC Solenoid wire. The only code stored in this thing was a PO740, but after taking the customer for a testdrive with the new trans installed he stated that he was turning almost 2500 rpm's at 60 mph. I pulled the unit down to reg Drive, showed him the RPM's and the customer stated that's how it operated after he got the truck back after a differ shop had worked on it aprox a year ago. All is Well!

Jeffery Funk -
shiftkit@specialtytrans.com
TRNi Member Since: 6/1/00 (9 | 41)

RESPONSE TO FIX:

Date: Wed Nov 20 17:50:33 PST 2002
Subject: RE: 4L60E Just wanted to know

Jeff- Thanks for sharing the fix! Ain't it a shame what some shops will do for a quick buck? Good Job!

Joey Campbell - Campbell's Transmission Service
shifless@adelphia.net
TRNi Member Since: 4/6/98 (2 | 392)


End Of Thread





QUESTION:


Date: Wed Sep 11 19:53:26 PDT 2002
Subject: 4L60E, LIGHT SHUDDER INTO 2ND WHEN COLD
Vehicle: 1996 CHEVY TAHOE, 5.7
Mileage: 80000

PAST REPAIRS;

Original Customer Complaint: PLANTARY REAR WAS BLOWN UP

Original Codes Present: OBDII No data at connecter

Previous Repairs: T.C. REBUID KIT, BUSHINGS ,PLANTARY REAR, RING GEAR,SOLNOIDS, PSI ,3\2 SOLNOID,SHIFT KIT.


REPAIRS THIS VISIT;

Current Customer Complaint: car has not left shop

Codes Currently Present: no data

Work Completed: installed corvett servo adjust band and installed vcm repair kit

Summary: with pressure gauage hook up the pressures good in all ranges but when cold when driving the gauge really fluates from 150 to 125.after then when shifts to 2nd it kind of shudder lightly on the apply after warms up it works perfect.There no data at connector so we can not use our scanner so we will fix that but i notice there was a early and late style sonoide on the shift.AND i did use high energy band thanks david

Dave Crow -
joyceanddavid@webtv.net
TRNi Member Since: 05/24/2001 (13 | 3)

RESPONSES:



FIX:


Date: Sun Dec 8 11:28:11 PST 2002
Subject: 4L60E, LIGHT SHUDDER INTO 2ND WHEN COLD

This had a shudder when going into 2nd I end up putting a .420 boost in the pump and it fix the proplem. thanks david

Dave Crow -
joyceanddavid@webtv.net
TRNi Member Since: 05/24/2001 (13 | 3)

End Of Thread





QUESTION:


Date: Thu Dec 12 11:11:10 PST 2002
Subject: 4L60E, 4L60E Intermitent 2nd gear Slips Only
Vehicle: 1994 Chevy Silverado, 5.7 (350)
Mileage: 113477

PAST REPAIRS;

Original Customer Complaint: Transmission Wont Go

Original Codes Present: None

Previous Repairs: Rebuilt Trans Last January...


REPAIRS THIS VISIT;

Current Customer Complaint: Slips in 2nd

Codes Currently Present: None

Work Completed: Pulled Trans... Found Slightly burnt 2-4 Band and replaced Rear Sun Gear Bushing...

Summary: I put the Trans back in and it worked great for about the first 3 miles. 1-2 Shift started to weaken. 3-4 4-2 shifts were still good but the 3-2 was also starting to slip. I Checked the pressure (cant remember the values at the time) to see if there was a drop but it stayed steady... I even tried replacing the 3-2 kickdown solenoid. The only other info I can give is that this problem is only intermitent, as in it will grab 2nd strong sometimes and slip others kind of like it is half applying and then fully applying. Trans Temp makes no difference. Any help would be nice. P.S. I have the v-body out right now and am goin to try a force motor. Chris Pryor Pryors' Transmissions Specialists Eefrit@acsalaska.net

Chris Pryor - Pryor's Transmission
eefrit@acsalaska.net
TRNi Member Since: 1/9/98 (2 | 1)

RESPONSES:



FIX:


Date: Fri Dec 13 15:49:02 PST 2002
Subject: 4L60E, 4L60E Intermitent 2nd gear Slips Only

Found restricted flow in the Force Motor due to Trash.... Also found plugged screen on the transfer plate.. Sorry I left this thread open guys... I just started using trni and just found out how to close the threads.

Chris Pryor - Pryor's Transmission
eefrit@acsalaska.net
TRNi Member Since: 1/9/98 (3 | 1)

End Of Thread





PROBLEM / FIX:


Date: Sat Dec 14 06:43:37 PST 2002
Subject: 4L60E, Max line after O/H W/TransGo EPC Kit
Vehicle: 1995 Chevy Truck

Problem / Fix: This was a self inflicted wound. I've used the TransGo EPC Rebuild Kits and to this point, no problems. Well I came in to find that they had to replace the EPC on a 4L60E I just built, with a new one due to max line all of the time. Well I was expecting to see that I had put the Valve in backwards or something but all was fine, Valve free, etc. I didn't want to have to worry that perhaps you still have a just plain bad EPC and missed it even with the Kit so I went looking further. I Ohm checked it (again) and it was OK. Then we hooked it to the TranX and operated it. Seemed OK so we compared that to another one- same operation. Hmmm? Next, I took it apart and found the rubber diaghram was separated from the pintle. I have come to the conclusion that I caused this by overzealous cleaning of the EPC with the guts out. I have done a few since this and been a little more careful with my blowgun and no more problems.

Leo Schneggenburger -
lschneg1@rochester.rr.com
TRNi Member Since: 1/30/99 (7 | 537)

UPDATE BY AUTHOR:

Date: Sat Dec 14 10:43:55 PST 2002
Subject: RE: Max line after O/H W/TransGo EPC Kit

I don't think TransGo has the "publicity Machine" to get the suppliers going right away. Try Calling Bob Rance at TranStar, 1-800-964-4870. When I find out about something I tell him I want it and he goes and gets it from TransGo. Eventually they get the point and stock it. The last time I ordered two of the Refill Kits which drops the price further. Once you get the initial Kit you have the Tools to do the job and after that it is at $13.50 ea to O/H one in 5 minutes. Compared to your $53 from ATC (I think we get them for $43 from TranStar) it is well worth it. If the unit was really loaded with metal I would probably just replace it but you know how some of these 4L60E's just about only "need" a Shell.

Leo Schneggenburger -
lschneg1@rochester.rr.com
TRNi Member Since: 1/30/99 (7 | 537)


End Of Thread





QUESTION:


Date: Mon Jan 6 12:09:49 PST 2003
Subject: 4L60E, chatter
Vehicle: 1996 Chevrolet Tahoe, 5.7
Mileage: 125000

PAST REPAIRS;

Original Customer Complaint: No 4th check engine light on

Original Codes Present: 1812 Trans overtemp

Previous Repairs: Just rebuilt by us.


REPAIRS THIS VISIT;

Current Customer Complaint: Chatter on shifts

Codes Currently Present: none

Work Completed: Fresh build...went back and replaced boost valve and PR spring and valve

Summary: Odd problem...at 2/3 to 3/4 throttle the pressure gauge goes erratic and jumps up and down over 100 psi. Light throttle it's fine and full throttle is fine. Pressure starts jumping and shifts chatter. Nothing shows erratic on scan w/ movie mode, Vantage on EPC wires show steady current flow. What else would cause such a variance in pressure only at one throttle setting? Are ther any modifiers in the valve body controlling or modifying the pressure at this point, that can affect it that much? This is a regular customer and we never noticed the shudder (fluctuation) before. Same unit on build. We did block the isolator valve about 3 weeks ago and trans checked fine at that point.

Don Callender -
don@transmissionclinic.com
TRNi Member Since: 10/13/00 (1 | 3)

RESPONSES:



POSTED FIX:


Date: Tue Jan 7 14:27:38 PST 2003
Subject: 4L60E, chatter

I want to thank everyone for the QUALITY replies. Hal Quantz hit it on the head. What we have surmised is the following. We took out the boost valve and the 90lb variance in pressure went down to 30. With the lesser pressure rise the AFL valve didn't shuttle so bad. We then dropped the valve body and used the Sonnax AFL vavle. Problem solved, but it was a bit mushy. Dropped the pan again and reinstalled the boost valve and it works great. We think the increase in pressure causes the valve to overwork and creates the shuttle. I can see why the shift kit companies are fighting this. More line pressure, more shuttle or buzz in the valve lineup. Thanks Hal, Sonnax, and TRNI. Don

Don Callender -
don@transmissionclinic.com
TRNi Member Since: 10/13/00 (1 | 3)

RESPONSE TO FIX:

Date: Tue Jan 7 15:43:32 PST 2003
Subject: RE: 4L60E, chatter

Jan 07, 2003 Hi Don, Glad you got it fixed! I'd like to suggest that on the next couple of 4L60-E's that you install one of the commercially available VB calibration kits from a quality company like TransGo or Superior. The calibration is all ready to go for you along with options depending on your likes or the likes of the vehicle owner. Try it on a couple or three trial jobs. I really think you'll like it. Again....glad you got fixed! BTW...super diagnosis on Chuck Stansey's (sp?) Honda. You the man!

Stevie Lavallee - Steve Lavallee's Transmission Service
testresearch@attbi.com
TRNi Member Since: 4/1/99 (0 | 2)

RESPONSE TO FIX:

Date: Wed Jan 8 01:55:39 PST 2003
Subject: RE: 4L60E, chatter

Did you try assembling the original Pump with only the Slide inside? You should be able to shake it and hear it clack. If it sticks it can cause your problem. Not visible looking at it.

Leo Schneggenburger -
lschneg1@rochester.rr.com
TRNi Member Since: 1/30/99 (0 | 3)


End Of Thread





QUESTION:


Date: Tue Jan 14 20:40:00 PST 2003
Subject: 4L60E, 4x4 module for transfer case
Vehicle: 1995 Chevy S10 pickup, 4.3
Mileage: 104000

PAST REPAIRS;

Original Customer Complaint: None

Original Codes Present: None

Previous Repairs: None


REPAIRS THIS VISIT;

Current Customer Complaint: Transfer case will not shift into 4WD high, goes in 4WD low and 2WD high OK , but not 4WD high.

Codes Currently Present: None

Work Completed: Replace broken 3 button electric switch on dash & 4x4 computer module behind ashtray.

Summary: Transfer case shifted great from 2wd high to 4wd high and all lights working properly for about 5 times, then it stopped working just like before. I figured maybe it was just a bad new 4x4 module so I install another one and it shifted from 2wd high to 4wd high about 30 times and then quit again. 2wd high to 4wd low and 4wd low to 2wd high is OK, just no 4wd high. Any ideas would be greatly appreciated.

Kent Nelson -
kent@mich.com
TRNi Member Since: 8/10/99 (1 | 0)

RESPONSES:



POSTED FIX:


Date: Thu Jan 23 06:32:57 PST 2003
Subject: 4L60E, 4x4 module for transfer case

Thanks to Christopher Sweeny and the fixdata base. I didn't think it would work but it did. I disconnected the negative & positive battery cables for 15 minutes, touched them together, then hooked the cables back up to the battery and 4x4 high started working, engaged it over 50 times to be sure. I forgot to cycle the key 7 times, but it worked anyway. I don't understand how this worked, but it did. Thanks for everyones suggestions.

Kent Nelson -
kent@mich.com
TRNi Member Since: 8/10/99 (1 | 0)

End Of Thread





QUESTION:


Date: Wed Jan 15 16:01:03 PST 2003
Subject: 4L60E, no movement with high line pressure
Vehicle: 1995 chevy camaro, 3.4
Mileage: 150,000

PAST REPAIRS;

Original Customer Complaint: 2nd gear starts,binds in manual 1st

Original Codes Present: code 93 pcs

Previous Repairs: scanned with road test,changed pcs,checked wires


REPAIRS THIS VISIT;

Current Customer Complaint: did oh, with tc,mok,all solenoids,band and rev.drum,sprags,and sonnex check ballacc.,and both acc pistons.

Codes Currently Present: code 93 came back pcs problem

Work Completed: pressure test,checked battery voltage,scanned again replaced tc

Summary: after oh had no movement with very high line checked manual valve ,replaced tc. same problem would very much like some input on this one. thanks

Gregory Gaal -
gregg505@aol.com
TRNi Member Since: 3/27/00 (1 | 0)

RESPONSES:


UPDATE:


Date: Thu Jan 16 17:01:00 PST 2003
Subject: 4L60E, no movement with high line pressure

thanks for your reply jerry and don, i know this is a weird one,im sure i got 2 problems here today i checked power to trans had nothing then went to computer had nothing so i think i need a pcm, other problem i think is mechanical,we pulled unit coundnt find a thing tried input shaft in tc splines r ok this is the 2nd tc we tried in the car,got unit down to nothing cant see a thing all splines ok everywhere were stumped here yet, talked to pete at atsg today he feels same as i do on this told me to air check forward clutch and turn input shaft it shoud turn freely well it dont, but i cant see a damn thing wrong anywhere.

Gregory Gaal -
gregg505@aol.com
TRNi Member Since: 3/27/00 (1 | 0)

MORE RESPONSES:


UPDATE:


Date: Tue Jan 28 16:10:10 PST 2003
Subject: 4L60E, no movement with high line pressure

hello all,i put this one on the back burner till today had to get some money jobs done,last time we installed this unit it dint move removed tore down couldnt see a thing wrong reassembled but really bolcked the caes and valve body good,now we have good forward but very faint engagement in rev.and also binds,so we replaced vb. same problem im at a lost right now any suggestions ?

Gregory Gaal -
gregg505@aol.com
TRNi Member Since: 3/27/00 (2 | 0)

MORE RESPONSES:



POSTED FIX:


Date: Tue Feb 4 16:17:57 PST 2003
Subject: 4L60E, no movement with high line pressure

hello everybody, finally got this one fixed,after many hours and vb changes etc. i bought a good core built it and trans worked fine,but still had high line i suspected comp. after checking hot wire no juice coming from comp. so i bought a used comp. installed all is fine now car left today, thanks to all who responed.

Gregory Gaal -
gregg505@aol.com
TRNi Member Since: 3/27/00 (2 | 0)

End Of Thread





PROBLEM / FIX:


Date: Wed Feb 5 06:23:13 PST 2003
Subject: 4L60E, 4l60e suspect defective pressure switch manifold

Problem / Fix: This switch was purcased from a GM dealer 12/30/02. Returned to my shop 2/01/03. Note the failures of the failure of the d2 & d2 orings and the deformity of the L oring. This may be an isolated incident but I think we should keep a watch for more of these.



Bruce Bekkerus
a1mhd2@aol.com


End Of Thread





QUESTION:


Date: Thu Jan 30 13:47:32 PST 2003
Subject: 4L60E, shift' s 1,3,4
Vehicle: 1997 chev tahoe, 5.7
Mileage: 139652

PAST REPAIRS;

Original Customer Complaint: no movement

Original Codes Present: none

Previous Repairs: this transmission was rebuilt 8,000 mile's ago with sprag's, bearing kit, all clutch plate's & seal's all bushings & solenoid's and rebuilt torque conveter. also installed a superior valve body kit


REPAIRS THIS VISIT;

Current Customer Complaint: no movement

Codes Currently Present: none

Work Completed: dissasembled transmission & replaced all seal's & clutch plate's. replace internal harness & 3/2 & pwm solenoids. replaced defective converter

Summary: after going through this again to clean up the mess from the torque converter had no 1/2 shift & no manual 2nd. everthing else work's great. dissasembled the servo again looking for a cut seal ring or problem there. i quess the main question i have is can a defective or wrong 3/2 solenoid cause no 2nd

Gary Mullins - Gary's transmission service
mullins@pldi.net
TRNi Member Since: 1/6/98 (1 | 0)

RESPONSES:



POSTED FIX:


Date: Wed Feb 5 07:51:40 PST 2003
Subject: 4L60E, shift' s 1,3,4

after calling the dealer & confirming i had installed the right 3/2 & pwm solenoid & correct internal harness i checked pressure at the servo & found no pressure in 2nd. pulled valve body back off & rechecked everything after not finding any thing wrong i got another valve body & swapped all solenoids & valve body kit. the valve body was a fix.

Gary Mullins - Gary's transmission service
mullins@pldi.net
TRNi Member Since: 1/6/98 (1 | 0)

UPDATE BY AUTHOR:

Date: Wed Feb 5 10:00:40 PST 2003
Subject: RE: 4L60E, shift' s 1,3,4

howard the solenoid feed hole's were .030 i don't feel like this was a problem as i reused the original spacer plate. i check the servo pressure by using a old servo cover that i had drilled and tapped to accomadate a pressure gauge. also i forgot to say thank's for the great reply's

Gary Mullins - Gary's transmission service
mullins@pldi.net
TRNi Member Since: 1/6/98 (1 | 0)


End Of Thread





QUESTION:


Date: Wed Feb 5 13:04:34 PST 2003
Subject: 4L60E, will start out in 4 gear never down shif
Vehicle: 1997 chevy blazier, 4.3
Mileage: 78000

PAST REPAIRS;

Original Customer Complaint: Starts out on 4 no downshift by itself only if you manually shift it down to first second and third will it shift by itself.

Original Codes Present: none

Previous Repairs: disassembled trans complete to inspect found nothing wrong installed the blazier still starts out in 4th and not in first looked to see if anyone had this problem before could not see any problems like this one.


REPAIRS THIS VISIT;

Current Customer Complaint: now that i have the whole truck i can look at the wireing or fuses to see if i find any codes or bad wires. hope someone has had this problem.

Codes Currently Present: none

Work Completed: i was going to pull the pan but i want to wait to see if anyone has had this problem before

Summary: none

James Leal -
jcaphook@aol.com
TRNi Member Since: 5/7/00 (1 | 0)

RESPONSES:


UPDATE:


Date: Wed Feb 5 16:06:32 PST 2003
Subject: 4L60E, will start out in 4 gear never down shif

I checked all the fuses before i started this time. also the shift solenoids will not change they stay the same . and it stay on the 3rd gear as the current gear. on the snap on scanner no codes.

James Leal -
jcaphook@aol.com
TRNi Member Since: 5/7/00 (1 | 0)

MORE RESPONSES:


UPDATE:


Date: Thu Feb 6 09:29:17 PST 2003
Subject: 4L60E, will start out in 4 gear never down shif

I pulled the pan last night and replaced the two soleniods with two know good ones. I also checked the power on the pin E on the pink wire and no power at all . There was no power to any pins with a test light i checked the test light to see if it worked on the battery.I double checked all fuses they are good . checked with snapon scanner and the soleniods 1-2 and 2-3 still stay on the off position there is no shift at all.maybe the problem is inside the vcm computer

James Leal -
jcaphook@aol.com
TRNi Member Since: 5/7/00 (1 | 0)

MORE RESPONSES:



POSTED FIX:


Date: Thu Feb 6 21:29:06 PST 2003
Subject: 4L60E, will start out in 4 gear never down shif

fix the trans was ok all the time just like everyone said thanks to all . I replaced the whole ignition wire lume from the colume to the connecter under the brake peddel. before I buttoned it all up I checked it on the hoist it worked great all you guys have better wireing diagrams than I do i looked for the pink wire on pin e and it does have it but its not on the same lume it must cross over from the small wire lume connectors on each side of the large connector with the bolt. it all worked great thanks to all you guys sure new what you were talking about as usual. It never had 4th gear it just stayed in third gear never shifted at all the man at the parts chevy store said that that wire lume was a very comon item. it sold all the time. James Leal

James Leal -
jcaphook@aol.com
TRNi Member Since: 5/7/00 (1 | 0)

End Of Thread





PROBLEM / FIX:


Date: Wed Feb 12 20:22:39 PST 2003
Subject: 4L60E, Loss of TCC apply
Vehicle: 1996 Chervolet Pickup

Problem / Fix: Group, I thought this one was odd so I decided to post to possibly save some of you some trouble. We had a customer come in saying that his 1996 Chevrolet truck 4L60E 350 (R) engine that would fall out of gear at about 50 mph. We scanned the DTCs and got a P0300 (Random Engine Misfire). As I mentioned a while back on TRNi a P0300-308 can indeed stop the TCC from being applied. We cleared the DTC with the Tech2 and took it for a test drive. As soon as the TCC applied I felt a faint engine misfire followed by the TCC disengaging. Being I had the Tech2 still on the truck I hit DTCs and found out that there were no DTCs stored. So I drove it for about 5 minutes with the engine misfiring several times. Still no SES light or any DTCs, BUT the TCC would not apply. I pulled over and turned the key off, and drove it some more and the TCC would NOT reapply. Keep in mind this vehicle didn't store any current or history DTCs even with the GM factory tool the Tech2. So what I have is no TCC apply, and no real reason, and no DTCs. What I did next shocks me. I cleared the DTCs and POW the TCC applies instantly till the VCM sees another engine misfire. I can clear the DTCs running down the road doing 55 and as soon as I do, the TCC comes on, until the VCM detects another misfire. The odd thing is there are NO DTCs stored or present. So what bugs me is we might have really chased our tail IF we had not seen the original DTC P0300 and felt the engine misfire. We could see a spark plug wire shorting to ground on the shield, and replaced it and the TCC apply is now fixed. I just found it odd that no DTCs were stored immediate, BUT the VCM thought enough of the miss to shut down the TCC apply.

Dan Tucker - Tucker's Transmission
transman@prodigy.net
TRNi Member Since: 4/23/97 (1 | 28)

RESPONSE TO FIX:

Date: Thu Feb 13 00:49:21 PST 2003
Subject: RE: Loss of TCC apply

Great tip Dan. It may be the year but some Misfire Detection criteria require a second trip with the same condition to set the MIL. There is in depth information in the GM section of iATN.

Leo Schneggenburger -
lschneg1@rochester.rr.com
TRNi Member Since: 1/30/99 (1 | 47)

RESPONSE TO FIX:

Date: Thu Feb 13 01:12:37 PST 2003
Subject: RE: Loss of TCC apply

From iATN and GM: General Motors On-Board Diagnostics - Generation Two (OBD II) Home > Technical Resources > GM > OBD2 > Catalyst Damaging & Emission-Threatening Misfire w/Misfire Relief Emission Threatening Misfire Full Range Misfire Detection Misfire Monitoring Catalyst Damaging and Emission-Threatening Misfire with Misfire Relief In 1996, the federal government relaxed the laws concerning misfire detection. This change is sometimes called "misfire relief." With misfire relief, the PCM still monitors cylinder misfire in 3200 crankshaft revolution blocks, but allows more 200 crankshaft revolution blocks with misfires within each 3200 revolution block before turning on the MIL.

Leo Schneggenburger -
lschneg1@rochester.rr.com
TRNi Member Since: 1/30/99 (1 | 48)

RESPONSE TO FIX:

Date: Thu Feb 13 05:29:23 PST 2003
Subject: RE: Loss of TCC apply

Thanks for the information great post i learned something

Ronald Kelly - Kelly Auto Repair
ronman58@hotmail.com
TRNi Member Since: 10/31/02 (0 | 5)


End Of Thread





QUESTION:


Date: Fri Feb 14 12:22:03 PST 2003
Subject: 4L60E, Vehicle creeps in park slowly
Vehicle: 1997 Chevy Astro AWD, 4.3L
Mileage: 59,435

PAST REPAIRS;

Original Customer Complaint: Vehicle slowly creeps down a fairly big hill while in park. About an inch or two every 15-20 seconds. It goes smoothly, not jerking or ratcheting like a bad park pawl.

Original Codes Present: None

Previous Repairs: N/A


REPAIRS THIS VISIT;

Current Customer Complaint: Same as above

Codes Currently Present: None

Work Completed: Removed transfer case and replaced the viscous clutch assembly thinking that was the only piece that could actually "slip" like it is.

Summary: I'm totally confused on this one, because to me everything else is splined and if that was the case I would think it would roll freely down the hill. Please help!! Tim

Tim Paitrick -
tptrans@powerweb.net
TRNi Member Since: 1/22/2002 (1 | 0)

RESPONSES:



POSTED FIX:


Date: Fri Feb 14 14:49:11 PST 2003
Subject: 4L60E, Vehicle creeps in park slowly

I've figured out that the front differential is bad. Either the axle stub shaft splines stripped or the pin broke, etc. I figured this out by watching the driveshafts while it was creeping and the front one turned the wrong way. The dealership took it back and decided to fix it themselves now that the hard part of figuring it out is done! Thanks for all the help!!. Tim

Tim Paitrick -
tptrans@powerweb.net
TRNi Member Since: 1/22/2002 (1 | 0)

End Of Thread





QUESTION:


Date: Wed Feb 19 06:00:24 PST 2003
Subject: 4L60E, forward in all gears
Vehicle: 1993 chevy blazer, 4.3
Mileage: 121052

PAST REPAIRS;

Original Customer Complaint: no reverse

Original Codes Present: none

Previous Repairs: replaced input housing reverse drum and stator got chewed up


REPAIRS THIS VISIT;

Current Customer Complaint: forward in all gears and binds in reverse

Codes Currently Present: none

Work Completed: checked manual linkage and check ball placement

Summary: any info before i pull it agian would be appreciated

Ken Schultz - NIAGARA TRANSMISSION
niagaratrany@aol.com
TRNi Member Since: 07/31/2001 (2 | 0)

RESPONSES:



POSTED FIX:


Date: Thu Mar 6 06:50:46 PST 2003
Subject: 4L60E, forward in all gears

had stuck upper teflon sealing ring in input housing bleeding fluid from converter to over run clutch

Ken Schultz - NIAGARA TRANSMISSION
niagaratrany@aol.com
TRNi Member Since: 07/31/2001 (2 | 0)

End Of Thread





PROBLEM / FIX:


Date: Wed Mar 12 16:01:02 PST 2003
Subject: 4L60E, Reverse binds when Code sets!
Vehicle: 1993 Chevrolet Astro

Problem / Fix: We couldn't understand why code setting would cause reverse problem? Well, if the valvebody gasket is blown out, crossleak, and transmission goes high line, it will apply other components. The transmission would set code 66 3-2 downshift quad driver 2 solenoid, then try reverse and it would bind, clear code and it would be fine. We disconnected harness and problem same, plugged back in and it would reset computer/trans and be fine, we finally unplugged the trans harness at the case and backed up until it acted up. Once, we identified that it was internal we removed it and found, valve body gasket blown, pieces blocking port. So, the moral of the story, Electrical can cause reverse complaints!!!

Steve Daubert - Transmissions Unlimited
transmissionsunlimited@yahoo.com
TRNi Member Since: 10/29/02 (1 | 1)

End Of Thread





PROBLEM / FIX:


Date: Tue Mar 18 16:42:38 PST 2003
Subject: 4L60E, Warning when using the Transgo VB Plates
Vehicle: 1993 Chevrolet Suburban

Problem / Fix: Group- Just a reminder to make SURE you check all of the holes in these plates as the instuctions say....I just got one that had one of the solenoid feed holes NOT drilled. It was the '93-'94 plate. Hope this helps someone. Joey Campbell

Joey Campbell - Campbell's Transmission Service
shifless@adelphia.net
TRNi Member Since: 4/6/98 (0 | 49)

End Of Thread





QUESTION:


Date: Wed Mar 26 19:25:07 PST 2003
Subject: 4L60E, No 3rd or 4th when cold
Vehicle: 1998 Chevt PU, 5>7
Mileage: 55.000

PAST REPAIRS;

Original Customer Complaint: No third or fouth when co;d

Original Codes Present: None

Previous Repairs: None


REPAIRS THIS VISIT;

Current Customer Complaint: same

Codes Currently Present: same

Work Completed: Removed trans found nothing wrong. Air checked good. Replaced all sealing rings on input shaft. Reseale input drum even replact the molded 3-4 piston.

Summary: When it is cold you can look at the scanner 3rd and 4th are being commanded. You can go to shift command. Still no 3-4. It will neutralize when it show gear. But when it gets warm It will work perfect.

Ron Randall -
ronrandall77@aol.com
TRNi Member Since: 03/27/2001 (2 | 1)

RESPONSES:



POSTED FIX:


Date: Thu Apr 3 07:41:49 PST 2003
Subject: 4L60E, No 3rd or 4th when cold

Replaced both shift solonlds Trans. works good. I had one last week doing the samething. I changed the sols. in that one also, but the 3-4 clutches were too far gone and that one did not fix that one.

Ron Randall -
ronrandall77@aol.com
TRNi Member Since: 03/27/2001 (2 | 1)

End Of Thread





QUESTION:


Date: Mon Apr 7 14:15:41 PDT 2003
Subject: 4L60E, converter surges on off at higher speeds
Vehicle: 1995 chevy blazer, 4.3
Mileage: 168000

PAST REPAIRS;

Original Customer Complaint: surges at highway speeds

Original Codes Present: 1870 trans slip

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: surges at highway speeds

Codes Currently Present: 1870 trans slip

Work Completed: scan system, road test.

Summary: scan system. tps steady, command for tcc steady, trans temp hot or cold will create problem, command for tcc steady on, rpms fluctuate when surging accures, this is the converter clutch comming on and off

Steve Allbee -
sallbee@worldnet.att.net
TRNi Member Since: 12/8/97 (2 | 21)

RESPONSES:


UPDATE:


Date: Mon Apr 7 16:05:37 PDT 2003
Subject: 4L60E, converter surges on off at higher speeds

I went after a hunch and pressure tested this pig. A real peta for hooking up a guage set. But, anyway, drive is 50 and line rise is not quit 100 at best. Reverse is 55 and line rise is poor also. Transdoc says 50 to 180 in drive and reverse 65 to 325. Now the kicker, this has the 4 plug in computer and I went and checked cavity 26 in the red and no wire, do I have a problem with the ground wire update??? When this thing would surge and I give a little throttle the surging seemed to quit.

Steve Allbee -
sallbee@worldnet.att.net
TRNi Member Since: 12/8/97 (2 | 21)

MORE RESPONSES:



POSTED FIX:


Date: Tue Apr 8 10:35:36 PDT 2003
Subject: 4L60E, converter surges on off at higher speeds

First I want to give a great big kudo to Darwin for suggesting the EASE software for the laptop. First off I spent most of the day yesterday learing the system, after that I used the Tech2 transmission Data(EASE) to record while this vehicle was acting up, then I installed a pressure guage and found weak line rise. Then out of my own initiative installed the ground wire kit on the computer. I then went on a road test and NO more surge. I took another recording of the computer system and found the Force motor duty cyle, the tp sensor volts, tp angle, and force motor actual current had changed. Most important the problem was solved. I am going to remove the pan and check for damage, but the surging has been corrected. One last note, I removed the wire harness to the transmission while checking for line rise or max line pressure, much easier than power braking. another note, because I removed the harness, the service engine soon light come on and I hooked up the snappy scanner and NO CODES were detected. Hooked up the EASE and had three codes and cleared. steve

Steve Allbee -
sallbee@worldnet.att.net
TRNi Member Since: 12/8/97 (2 | 21)

RESPONSE TO FIX:

Date: Tue Apr 8 16:42:10 PDT 2003
Subject: RE: 4L60E, converter surges on off at higher speeds

Hi Steve, Interesting to see that the '96 wiring update fixed this '95. Was this a late production vehicle? Also, you mention Tech2, does the EASE Software simulate what the Tech2 does? Thanks.

Leo Schneggenburger -
lschneg1@rochester.rr.com
TRNi Member Since: 1/30/99 (1 | 74)


End Of Thread





PROBLEM / FIX:


Date: Tue Apr 8 16:27:53 PDT 2003
Subject: 4L60E, po751--Shifts 1-3,3-4
Vehicle: 1999 chev C1500

Problem / Fix: Group- We had the above truck in for the complaint above. Codes had been previously erased, but code returned on test drive. On the rack, we commanded the shift solenoids on and off with the scanner. We then pryed the servo cover with a prybar, and had almost 1/2" of travel. Removed Trans, and found the 2-4 band lining completely delaminated from the band. No other friction elements were damaged..except for slight burning of the 3-4's. There were NO signs of water/antifreeze contamination. Customer said no previous service or additives had been used. Did a soft part overhaul, and alls well. I do plan on having an oil analysis performed, but after talking with several people, I really think that the glue that held the band lining in place was poor or poorly cured.This is JMHO at this time, but hope this info helps someone.

Joey Campbell - Campbell's Transmission Service
shifless@adelphia.net
TRNi Member Since: 4/6/98 (0 | 57)

End Of Thread





QUESTION:


Date: Fri Apr 11 06:04:40 PDT 2003
Subject: 4L60E, slips shifts every gear 1-2 2-3 3-4
Vehicle: 1996 Chevrolet 1500 series , V6
Mileage:

PAST REPAIRS;

Original Customer Complaint: would not move

Original Codes Present: n/a

Previous Repairs: overhaul


REPAIRS THIS VISIT;

Current Customer Complaint: slips shifts

Codes Currently Present: n/a

Work Completed: test drive ,check fluid

Summary: worked good after overhauling for about 3000 miles, then starting getting long shifts. Does anyone have any more information on the bulletin 97-43. I can not find it. It seems like this could be my problem

Lee Hughes - Hughes Precision Automotive
lhughes@sitestar.net
TRNi Member Since: 1/29/2003 (6 | 1)

RESPONSES:



POSTED FIX:


Date: Wed Apr 23 11:41:14 PDT 2003
Subject: 4L60E, slips shifts every gear 1-2 2-3 3-4

I got that update kit from the dealership and that fixed the problem. Sorry it took me so long to report the fix. Thanks again Jerry.

Lee Hughes - Hughes Precision Automotive
lhughes@sitestar.net
TRNi Member Since: 1/29/2003 (6 | 1)

End Of Thread





QUESTION:


Date: Wed Apr 23 14:23:42 PDT 2003
Subject: 4L60E, Misc. Sol. codes Problem/Fix
Vehicle: 1997 Chev Tahoe, 5.7
Mileage: 97k

PAST REPAIRS;

Original Customer Complaint: A general repair shop replaced the original trans with a salavge yard unit and had various shifting complaints. They brought it to me to diagnois.

Original Codes Present: Check engine light on but no codes shown in normal code scan. Code PO785 (3-2 shift sol) stored in freeze frame memory. Line pressure stayed high even after clearing codes and with check engine light off.

Previous Repairs: NA


REPAIRS THIS VISIT;

Current Customer Complaint: NA

Codes Currently Present: NA

Work Completed: Complete electronic systems check.

Summary: Found clip from cooler line down inside transmission electricial connector. It had the ground side of the 3-2 solenoid shorted to two of the terminals for the pressure switch manifold. May never see it again,but wanted to share.

Mark Pugliese -
marklpugliese@aol.com
TRNi Member Since: 4/14/00 (1 | 1)

RESPONSES:



POSTED FIX:


Date: Wed Apr 23 14:26:34 PDT 2003
Subject: 4L60E, Misc. Sol. codes Problem/Fix

Clip from cooling line down inside trans. connector, shorting the terminals together.

Mark Pugliese -
marklpugliese@aol.com
TRNi Member Since: 4/14/00 (1 | 1)

End Of Thread





PROBLEM / FIX:


Date: Thu May 8 16:05:40 PDT 2003
Subject: 4L60E, Code P1870
Vehicle: 1998 Chevrolet Blazer

Problem / Fix: Group- I know this is "old hat" sorta , but I just wanted to post this for our newer members. We had the above vehicle in this week for the complaint of a Harsh 1-2 shift. Scan revealed a P1870 in History and Fail Records. Cleared info, and was able to get the code to reset as TFT reached the 190 F range.TCC PWM % was maxed and TCC slip was 150-225.The code would not set until TFT was above 190F...which to me proved that the TC lining was not damaged enough to replace it.Did a pressure test, all pressures were good.Did a pan drop and broke open the filter...clean as a whistle. I called the customer and explained that most likely we could fix the harsh 1-2 without doing an overhaul, and explained that she may have a broken/stripped reactionshell, solenoid failure or any number of other problems at a later date,and we could not warranty those.She gave us the green light.Installed the Sonnax-04 kit,and no more P1870...this Blazer had 108,000 miles on it! Here's the reason for my post... Don't be afraid to be upfront and honest with your customer when you see one of these come in with hi mileage...and a P1870 stored! ...just explain that yes, you most likely can fix the harsh 1-2 ,but you can't warranty any other failure(s) that they may encounter down the road. Also tell them that even if they do have a failure at a later date, the Sonnax kit and ream would still have to be performed. I know that I may catch some flak about this, but I feel that the customer really appreciates the honest, upfront approach. I also would not recommend to try this IF the TCC slip is unacceptable at TFT's below 160-165. Take time to read Dan Tucker's tech tip about this in the Tech Tip section of TRNi. Since I started using his tip, I've had GREAT success with these P1870 codes. Thanks Again, Dan! HTH

Joey Campbell - Campbell's Transmission Service
shifless@adelphia.net
TRNi Member Since: 4/6/98 (0 | 71)

RESPONSE TO FIX:

Date: Fri May 9 06:00:51 PDT 2003
Subject: RE: Code P1870

im a new member thanks for info great post

Ronald Kelly - Kelly Auto Repair
ronman58@hotmail.com
TRNi Member Since: 10/31/02 (1 | 14)

RESPONSE TO FIX:

Date: Sun May 11 04:59:00 PDT 2003
Subject: RE: Code P1870

Joey, I won't give you any flak because we do as well but w/ SK instead. There should be a post that I did on one that was really bad where the CEL had been on for over a year. It was for a friend that knew he was a test pigy. He has sent me several leads due to me fixing his problem for only $400. When it finally tears up, I know he will bring it back if it doesn't get traded in on a new one. One thing I have learned however it that although the situation you describe is true / accurate, easy for me to understand, I am not sure the customer always gets it. A case in point would be trying to explain how a customer's 604 is in fail safe for a different reason than it was last time. All they know is that it is doing the same thing - hard/slow to take off and won't shift. I still think you doing the right thing :)

Chuck Stasny - Houston AAMCO
cdsstaz@wt.net
TRNi Member Since: 12/7/2001 (6 | 125)


End Of Thread





PROBLEM / FIX:


Date: Wed May 28 14:49:25 PDT 2003
Subject: 4L60E, Code 66..Self inflicted wound.Good laugh
Vehicle: 1993 CHEVREOLET Suburban 5.7 4x4

Problem / Fix: Group- This is almost too embarrasing to post, but maybe it will help someone.We had the above truck in this week for a complete overhaul(no 2nd gear, and tcc shudder.)No codes were stored.Routine overhaul w/all electrical components(internal wiring harness from Rostra,pcs,3-2 solenoid,psm,and shift solenoids...152,000 miles on truck.) Installed trans, and dern! 2nd gear starts, only a 2-3 upshift and tcc apply. It would go into 1st with selector in manual lo. Checked for codes...66 was stored. Huh? I thought the default action for a code 66(3-2 pwm downshift solenoid circuit problem) was 3rd gear starts and Max. line pressure. We tried to activate the solenoids with the Mastertech, and the only solenoid that would respond was the tcc apply.Checked voltage at E terminal..12.4 volts. We were able to activate the shift solenoids by grounding the appropriate wires at the pcm, but not the 3-2 pwm solenoid. Wire continuity was great for the 3-2 solenoid circuit. Now what? We thought *maybe* a bad internal wiring harness, so we hooked another one up with all solenoids to the vehicle connector...same thing. Gave up and went to lunch..came back and as we were looking at the extra wiring harness we had rigged, it occured to us that I had installed the 3-2 pwm solenoid into the v.b where a TCC PWM solenoid would go on a '96 model! Dropped pan, put the 3-2 solenoid in it's proper position and attached the proper connector, cleared the codes and life is good once again. I know this was a stupid mistake, but it is one that can be easily done, and pretty hard to diagnose...I was thrown by not being able to command the shift solenoids on/off...and the fact that it would shift 2-3 and lockup just fine,when all the info I had concerning a code 66 said the default action taken by the pcm was 3rd gear starts. Like I said, self inflicted....but a good lesson learned. I hope this helps someone. Now I'll go put my thumbs in the vice and clamp it shut!

Joey Campbell - Campbell's Transmission Service
shifless@adelphia.net
TRNi Member Since: 4/6/98 (0 | 78)

End Of Thread





QUESTION:


Date: Tue May 13 13:46:56 PDT 2003
Subject: 4L60E, Codes 742 & 1810
Vehicle: 1997 Chevy Van 1500, 5.7
Mileage: 106233

PAST REPAIRS;

Original Customer Complaint: Noise from transmission

Original Codes Present: None

Previous Repairs: Rebuilt transmission, overhaul kit, front planetary and shift solenoids.


REPAIRS THIS VISIT;

Current Customer Complaint: Service engine light on.

Codes Currently Present: P0742 converter clutch stuck on P1810 undocumented

Work Completed: Retrieved codes only

Summary: I don't understand the code, because it doesn't stall at a stop and the converter releases when you apply the brake.

Kent Nelson -
kent@mich.com
TRNi Member Since: 8/10/99 (2 | 0)

RESPONSES:


UPDATE:


Date: Sat May 17 05:41:23 PDT 2003
Subject: 4L60E, Codes 742 & 1810

After the codes are cleared they come back in about 15 miles. I changed the PRNDL switch because on the OTC Genisis scanner it said:(transmission range - invalid) and on the snap on scanner it would read: Rev when in park,reverse or neutral and read 4th in 3rd or 4th and read low in 2nd or 1st. No change with the new PRNDL switch. Using the OTC scanner here are some of the readings TFT sensor: -40 DegF (now thats cold), Trans output speed: 3 (standing still), Tranmission range: Invalid, Brake switch: Released (no change when brake applied), TCC slip: 3410 (at an idle of 800), Vehicle speed: 0 mph (even when moving). Snap on scanner reads OK except for the PRNDL switch, which I changed and it still read the same. Called OTC tech line and asked why the scanner was not reading properly and the snap on was? (OTC works fine on other vehicle) He said it because the two scannner use different wires for a ground. Could this be pointing to a ground problem? Is the false reading of TCC slip of 3410 causing the Code 742? Thanks for your help.

Kent Nelson -
kent@mich.com
TRNi Member Since: 8/10/99 (2 | 0)

MORE RESPONSES:



POSTED FIX:


Date: Thu May 29 21:39:51 PDT 2003
Subject: 4L60E, Codes 742 & 1810

Replaced pressure manifold switch and all is good. Code 1810 must have set code 742 as Joey & Ray had suggested. Thanks for the help.

Kent Nelson -
kent@mich.com
TRNi Member Since: 8/10/99 (2 | 0)

End Of Thread





PROBLEM / FIX:


Date: Sun Jun 8 21:42:20 PDT 2003
Subject: 4L60E, Slams into drive and 1-2 shift hard
Vehicle: 1993 Chevy Truck 1500

Problem / Fix: Checked problem hot and cold the same. Checked presure reading was high 160-180 in drive at idle. Checked force motor ohms fine, replaced with good use same results. Checked wire harness look ok. Traced wires from force motor to computer and did a continuity check ok. The force motor wasn't getting any voltage. The only thing left was the Emc replaced and the presure dropped to 90lbs. at idle and the shifts were normal. Nick

Nick Parrino -
ptruthfound@cs.com
TRNi Member Since: 9/10/00 (0 | 1)

End Of Thread





QUESTION:


Date: Tue Jun 10 17:09:33 PDT 2003
Subject: 4L60E, 1,2,4 rev good shape slips on 2-3 shift
Vehicle: 1998 chevy p/u 4x4 silverado, 4.3
Mileage: 113450

PAST REPAIRS;

Original Customer Complaint: 4x4 wont engage with poss. tranny problem

Original Codes Present: 1121

Previous Repairs: 4x4 module and encoder


REPAIRS THIS VISIT;

Current Customer Complaint: n/a

Codes Currently Present: none

Work Completed: none

Summary: removed pan inspected fluid coloration very good. removed epc both shift sol. replaced .this trans was rebuilt six months ago does not appear to have much usage as far as clutch debris in pan. have heard some about a harness update? could someone explain

Richard Turner -
rturner@datalinkok.com
TRNi Member Since: 01/02/01 (3 | 0)

RESPONSES:



POSTED FIX:


Date: Thu Jun 12 20:12:22 PDT 2003
Subject: 4L60E, 1,2,4 rev good shape slips on 2-3 shift

removed valve body inspected acc. checkball in case. looked to be ok but replaced just for curiosity sake. same problem, removed trans for teardown, 3-4 clutches ok, acc. checkball capsule good, valvebody inspected found no problems removed encapsulated checkball ass. put case in hot tank washer for 45 min. removed found small crack on capsule housing from servo side in case replaced case, trans works fine. would like to thank everyone for all the help. this one really stumped me THANKS AGAIN.

Richard Turner -
rturner@datalinkok.com
TRNi Member Since: 01/02/01 (3 | 0)

End Of Thread





QUESTION:


Date: Thu Jul 17 17:24:49 PDT 2003
Subject: 4L60E, 4L60E binding in 3rd after o-hual
Vehicle: 1996 Chevy S10, 2.2
Mileage: 110000

PAST REPAIRS;

Original Customer Complaint: No rev. 2nd gear starts

Original Codes Present: n

Previous Repairs: n/a


REPAIRS THIS VISIT;

Current Customer Complaint: After o-haul I have a 2nd gear start and it falls back into 1st gear and when it shifts to second again it binds and third binds as well. If second gear it select by the shifter there is no binding. No binding on 2nd gear start as well. Possible pump screen?

Codes Currently Present: n

Work Completed: none yet

Summary: Help, I am fixing to tear this unit back down any info would be apreciated.

Brian Jones - All Roads Transmission
allroadsts@aol.com
TRNi Member Since: 3/4/2003 (1 | 1)

RESPONSES:



POSTED FIX:


Date: Thu Jul 17 20:18:01 PDT 2003
Subject: 4L60E, 4L60E binding in 3rd after o-hual

I know it sounds strange but the pump screen fixed the problem. I built 3 of these units today and i found the screen on the floor. I had a solinoid problem on the first which is the one I thought the screen was out of. I did not know how that this could cause such a problem. The way I FIGURE IS THIS Leaving screen out cause a low pressure at idle due to some unforseen leak. Slight throttle apply causes pressure rise causing the valve for 1st to swing therefore the kick back to first, But way did it cause a bind in 2nd and 3rd? I know it did because it is now fixed. In a 700 a pressure lose happens when it is left out, I guess the electronics causes the 4L60E to respond different?

Brian Jones - All Roads Transmission
allroadsts@aol.com
TRNi Member Since: 3/4/2003 (1 | 1)

End Of Thread





PROBLEM / FIX:


Date: Fri Jul 18 20:03:09 PDT 2003
Subject: 4L60E, DTC 1345 after overhaul
Vehicle: 1997 Chevrolet Pickup

Problem / Fix: Group, We had this vehicle come in with a routine broken reaction shell. We scanned for DTCs before the transmission was removed and had only a DTCP1870 on it. Everything was normal and routine.....UNTILL we filled it up with fluid and the Service Engine Soon light came on. Because we had only a P1870 on it before, we are feeling like we done something wrong. Did we pinch a wire in the bell housing, etc, was what was going though our minds. We scanned the DTCs and came up wit a P1345, now what in the world was that? It is a Crankshaft/Camshaft position sensor correlation. I hate this kind of stuff, as we all have the 'blank deer stairing at headlights at night' look on our face. We checked the cam sensor connections and looked at the RPM reading on the scanner during nd after startup, but everthing looked great. The DTC 1345 trips on every startup after about 1-2 seconds. I couldn't see anything we could have done to cause the problem, till I got lucky (make that blessed) and noticed that the intake gaskets were fairly new looking. This got me to looking at the distributor cap and low and behold the distributor was loose. Not real loose but enough that Mr. Filler tube was able to kick it around a few degrees. We moved the distibutor back a couple of degrees at a time and after about 3 trys the DTC1345 went away. We locked the distributor down and no more DTC P1345. So if you run into a DTC1345, you might need to set the timing. This looks easy, but it took us about 2 hours to figure out.

Dan Tucker - Tucker's Transmission
transman@prodigy.net
TRNi Member Since: 4/23/97 (1 | 74)

End Of Thread





QUESTION:


Date: Sun Jul 6 07:05:09 PDT 2003
Subject: 4L60E, transfer failing to disengage
Vehicle: 1998 chevy s-10 blazer, 4.3
Mileage: 60000

PAST REPAIRS;

Original Customer Complaint: when put in 4hi it want go right back to 2hi. it sometimes takes several mile to kick out

Original Codes Present: scanner will not retive tfc codes

Previous Repairs: changed fluild in tfc fluid looked burnt .put a bottle of lucas in went for a test drive frist 5 times worked every time . then the samething all over so i replaced the shift motor tried it out works fine tried it 50 times every time slick as a button.


REPAIRS THIS VISIT;

Current Customer Complaint: cust comes back three month's later and said it realy never was working right. some day's it work's fine some day's it dont. where these people live they use 4wd every time they leave there house. now she claims going down the road it goes into neauteral and sometimes it will go into 4wd on it's on

Codes Currently Present: na

Work Completed: none

Summary: is there any way to retive codes manualy

Robert Johnson -
robertj_59@hotmail.com
TRNi Member Since: 8/22/99 (3 | 1)

RESPONSES:



POSTED FIX:


Date: Mon Jul 21 14:21:07 PDT 2003
Subject: 4L60E, transfer failing to disengage

sorry for being slow about given reply replaced switch on the dash no help replaced controller and all problems were gone.

Robert Johnson -
robertj_59@hotmail.com
TRNi Member Since: 8/22/99 (3 | 1)

End Of Thread





QUESTION:


Date: Thu May 15 19:41:23 PDT 2003
Subject: 4L60E, slips third gear
Vehicle: 1997 gmc taho, 5.7
Mileage: 123000

PAST REPAIRS;

Original Customer Complaint: broken case bad ujoint rear shaft

Original Codes Present: other shop pulled trans

Previous Repairs: no code slips third gear only


REPAIRS THIS VISIT;

Current Customer Complaint: still a shop

Codes Currently Present: none

Work Completed: pull trans third gear clutches burnt all other ok

Summary: new case from gm don't see any other problem

Robert Frame -
frame@chartermi.net
TRNi Member Since: 7/3/99 (4 | 1)

RESPONSES:



POSTED FIX:


Date: Sat Jul 26 05:37:59 PDT 2003
Subject: 4L60E, slips third gear

put in a brand new gm case, warp case is machine were valve body fits ,putd in a good used case avery thing works fine

Robert Frame -
frame@chartermi.net
TRNi Member Since: 7/3/99 (5 | 1)

End Of Thread





PROBLEM / FIX:


Date: Tue Aug 5 14:17:14 PDT 2003
Subject: 4L60E, Will not move, Foreward or Rev
Vehicle: 1998 Chevrolet 1500

Problem / Fix: Be careful with the aftermarket Ring gears on the output shaft. We have had two of them break and cause this problem. Inspect them very carefully. Ours looked good when installed but did not last 3000 miles. The customer was not hard on the vehicles either. Just faulty parts. Hope this helps some of you all. Alan Hutcheson Cottman Transmission Tupelo,MS

Alan Hutcheson -
hutcheson-racing@prodigy.net
TRNi Member Since: 8/15/2002 (2 | 4)

End Of Thread





PROBLEM / FIX:


Date: Tue Aug 5 18:43:10 PDT 2003
Subject: 4L60E, Terrible Engine Performance
Vehicle: 2001 Chevrolet Pickup

Problem / Fix: Group, We have seen this a few times and thought it might be worth posting, though, I don't have all the answers, I will tell our findings. We had a 2001 4L60E come in with the transmission slipping once it warms up a bit. Actually what was happening is the filter is stopping up and the transmission is sucking air, causing the slip. The really odd thing is once the transmission starts slipping the engine starts 'spitting and sputtering' like it has 3 or 4 bad plug wires. It idles OK, but if you try to stall test it, the motor just runs terrible. You can scan it for DTCs with the Tech2, and get nothing....no DTCs. Next I shut the engine off for a few seconds and let the filter soak through and once the transmission is pulling the engine runs perfect. OK, so where am I going with this? We like to make the customer aware of any problem we see BEFORE we start to work on their vehicle. This problem, can make you look dumb. Our experience has lead us to fix the transmission first, then worry about the engine performance, on the 1999 up GM vehicles afterwords. I 'think', and have NO data to back it up, so keep in mind it is my own thinking, that the VCM sees the transmission slip and puts the engine in a torque reduction mode to protect the transmission form further damage. We have seem this condition more than once and rebuilding the transmission cures the poor engine performance also. Most of the time it is a bad needle bearing in the transmission, grinding up and plugging the filter. So what I am saying is, I believe that you can repair a poor performing engine with a transmission overhaul. Weird. I could be wrong, this is just my opinion.

Dan Tucker - Tucker's Transmission
transman@prodigy.net
TRNi Member Since: 4/23/97 (1 | 100)

RESPONSE TO FIX:

Date: Wed Aug 6 07:47:18 PDT 2003
Subject: RE: Terrible Engine Performance

The 98 up GM and Dodge do this (sometimes) we call it torque demand when the trans slips the pcm turns the timming way back and the car seems to have an engine performance problem

jim hook - Jims Transmission Service
jimstransmission@charter.net
TRNi Member Since: 12/2/2002 (2 | 2)

RESPONSE TO FIX:

Date: Wed Aug 6 08:26:48 PDT 2003
Subject: RE: Terrible Engine Performance

GM started using that strategy (killing cylinders when transmission slip is detected) in some of their vehicles a few years ago (1999, I think). You also have to be careful when it comes to how quick you make a shift's duration as the PCM is looking at that also. I’ve heard of instances where “too quick” of a shift will cause a similar drivability problem.

Harvey Wilson - Reliable Transmissions Inc
harveywilson@rti-br.com
TRNi Member Since: 7/16/2003 (0 | 1)

RESPONSE TO FIX:

Date: Wed Aug 6 10:29:43 PDT 2003
Subject: RE: Terrible Engine Performance

Hi All, According to Steve Younger, 97 up GM vehicles retard the spark up to 20 degrees for up to 1/10 second during the shift for a NORMALLY WORKING TRANSMISSION. If the PCM detects a slip it will retard the spark for up to 1 full second. This presents a "fall on its face" shift feel. None of this data is presented on the scanner. The only way to see it is to record a movie and watch the spark timing, normal retard during a shift should be around 8 to 10 (snap-on) scanner frames. If the retard is going beyond this then the PCM is compensating for a slip. Jerry Martire

Jerry Martire - Shirlington Transmissions
transmission_doctor@worldnet.att.net
TRNi Member Since: 9/5/00 (3 | 86)

RESPONSE TO FIX:

Date: Wed Aug 6 15:06:03 PDT 2003
Subject: RE: Terrible Engine Performance

Is the solution to rebuild or is there an electronic fix?

Melvin Mann -
aajaxtrans1@uswest.net
TRNi Member Since: 02/28/2001 (7 | 50)


End Of Thread





QUESTION:


Date: Tue Aug 12 13:25:12 PDT 2003
Subject: 4L60E, VSS code
Vehicle: 1993 Chevrolet S-Blazer, 4.3
Mileage: 75000

PAST REPAIRS;

Original Customer Complaint: Not shifting into 4th

Original Codes Present: VSS

Previous Repairs: Replace VSS


REPAIRS THIS VISIT;

Current Customer Complaint: Won't shift to 4th

Codes Currently Present: none-cleared

Work Completed: none yet

Summary: This is a wierd one for me. We replaced the VSS for no signal. With the new vss, we get signal all the time! It reads 50 MPH in park in the lot. The computer commands an upshift in park. We guess it's a feedback issue, but don't know where to look. If you unplug the alternator, it works perfect. A new alternator did not fix the problem. (had to take at least one WAG at it). Any clues where to start? Don

Don Callender -
don@transmissionclinic.com
TRNi Member Since: 10/13/00 (7 | 110)

RESPONSES:



POSTED FIX:


Date: Wed Aug 13 08:49:15 PDT 2003
Subject: 4L60E, VSS code

You know, I got into this business 22 years ago because I hated electrical problems in general repair. Now look at us. Taking trannybobs advice we went to do a check at the battery, and Lo and Behold, the bolt on the ground cable was too long and wouldn't clamp the battery cable down tight! It's another fine mess we've gotten into Ollie! Vehicle is done, works fine. Boss, can I build another powerglide today????? Don

Don Callender -
don@transmissionclinic.com
TRNi Member Since: 10/13/00 (7 | 110)

End Of Thread





QUESTION:


Date: Wed Sep 3 06:49:18 PDT 2003
Subject: 4L60E, No speedo reading
Vehicle: 1995 GMC Pick-up, 5.7L
Mileage: 225K

PAST REPAIRS;

Original Customer Complaint: Wont move.

Original Codes Present: Transmission temperature out of range (hot)

Previous Repairs: None


REPAIRS THIS VISIT;

Current Customer Complaint: Wont move.

Codes Currently Present: None

Work Completed: Complete rebuild of both transmission and repair of transfer case. Transmission had ALL frictions and band burnt. Sun shell was broken at splines. Reverse drum wasa grooved from band. Transfer case needed 4WD fork and all seals.

Summary: After reinstall, speedo doesn't work. (Don't know if it worked before as vehicle would not move). Pulled speed sensor out & verified I had exciter ring properly securred and located. Switched speed sensor with known good one. Still no speedo. Scanner also shows 0 MPH when rear wheels are spinning (showing that T-case is not in neutral). I know that this subject has been kicked around before, but I have never had to get into the electronics of this before. I checked the data base, but could not find the discussions. I don't even know where the components are to check them or the terminals to check. If someone could point me to where the info is in the database, I'd appreciate it. Thanx! Charlie®

Chuck Reavis - Charlie Tranny
charlie@charlietranny.com
TRNi Member Since: 9/26/98 (5 | 34)

RESPONSES:



POSTED FIX:


Date: Thu Sep 4 10:55:21 PDT 2003
Subject: 4L60E, No speedo reading

It's FIXED!!!!! First off I'd like to thank all who gave me suggestions and information. They were Mike McLaughlin, Jerry Martire, James Curnutt, Dale Blake, Mark Sill, Dan Tucker, TraniBob, Richard from Japan and Kevin Tennis (my nephew). If I forgot anyone it was not intentionally! The problem was a broken wire (corroded inside the insulation) just up from the VSS plug. For future reference, there is a connector on top of the transmission case that is for just these two wired. It can be unplugged and the integrity of the wires to the VSS can be EASILY checked without having to pierce any wires. Thanx again to all who helped!!! Charlie®

Chuck Reavis - Charlie Tranny
charlie@charlietranny.com
TRNi Member Since: 9/26/98 (5 | 34)

End Of Thread





QUESTION:


Date: Tue Sep 9 09:09:22 PDT 2003
Subject: 4L60E, Slipping Forward
Vehicle: 1994 Chevrolet 3/4 Ton, 360 V-8
Mileage: 135,192

PAST REPAIRS;

Original Customer Complaint: Blowing fluid out when on long drive. Slipping.

Original Codes Present: TCC code. 59-Trans Fluid Temp Circuit High 67 Torque Converter Quad Driver 2 Solenoid 82 Shift Solenoid A Circuit

Previous Repairs: Complete rebuild. All new electrical. New converter TransGo Shift Kit. Transfer case front seal replaced.


REPAIRS THIS VISIT;

Current Customer Complaint: Customer heard loud clunk and bang. Pulled over and puddle of fluid on ground.

Codes Currently Present: None.

Work Completed: Replace case, siezed rear diff, and rear driveline that broke.

Summary: No ship. Delayed forward engagement. Pressure normal until shifted into O/D or D. Pressure drops to 30 psi, but comes up with throttle. Holds fine in 4th. No slipping in 4th. I feel there is a leak in the forward circuit. Removed unit and air checked. Inspected input drum for cracks. No forward complaints before case replacement. Checked aluminum forward accumulator piston & pin. Our unit in for non-warranty repair after 40,000 miles. Rear diff siezed, broke rear driveline, and transmission case. Customer says trans was working fine up until that time.

Larry Bloodworth - Certified Transmission & Drivetrain Clinic
larrybloodworth@hotmail.com
TRNi Member Since: 9/26/97 (1 | 6)

RESPONSES:



POSTED FIX:


Date: Wed Sep 10 08:50:22 PDT 2003
Subject: 4L60E, Slipping Forward

Cup plug for rear lube missing. There is a cup plug similar in size to the one that comes in TransGo shift kits for the reverse input clutch piston. It is very small and has a tiny orifice in it. It is driven in the case toward the rear of the vehicle. The oil passage to it looks like one that would go to the governor on a 700R4. This is forward clutch oil. The orifice squirts oil on rear area of extension housing, if it has one.

Larry Bloodworth - Certified Transmission & Drivetrain Clinic
larrybloodworth@hotmail.com
TRNi Member Since: 9/26/97 (1 | 6)

End Of Thread





PROBLEM / FIX:


Date: Thu Sep 11 14:44:46 PDT 2003
Subject: 4L60E, 2nd gear starts when hot
Vehicle: 95 GMC Safari Van

Problem / Fix: The van above had previously had new shift solenoids install and the solenoid feed holes opened to .031 by another shop. Customer wanted trans rebuilt as it had 170,000 miles and was a flower delivery van. After teardown, I really didn't find a whole lot wrong with the unit...2-4 band was burnt a little, and pump bushing worn. Did a standard overhaul,except I paid really close attention to the AFL bore and the tcc regulator bore in the v.b. The AFL valve would "squeeze" a little fluid when it was wiggled, and I mean a VERY little fluid. I didn't think it was enough to be concerned about. I did install a Sonnax -03K tcc regulator kit and only the 3-2 solenoid, tcc apply solenoid and the PCS. After installing the trans, I had the same 2nd gear starts as before. I removed the v.b. and installed the Sonnax AFL valve kit and it works great now. Man, it doesn't take but a very little wear in the AFL bore to cause problems. I hope this helps someone.

Joey Campbell - Campbell's Transmission Service
shifless@adelphia.net
TRNi Member Since: 4/6/98 (1 | 131)

End Of Thread





QUESTION:


Date: Thu Dec 12 14:23:27 PST 2002
Subject: 4L60E, Intermitent 2nd gear Slips Only-FIX
Vehicle: 1994 Chevy Silverado, 5.7 (350)
Mileage: 113477

PAST REPAIRS;

Original Customer Complaint: Transmission Wont Go

Original Codes Present: None

Previous Repairs: Rebuilt Trans Last January...


REPAIRS THIS VISIT;

Current Customer Complaint: Slips in 2nd

Codes Currently Present: None

Work Completed: Pulled Trans... Found Slightly burnt 2-4 Band and replaced Rear Sun Gear Bushing...

Summary: I pulled the Force Motor out of the V-Body and one of the screens on the Motor was completely plugged with trash. I put a new one in and also cleaned one of the screens in the transfer plate (it was completely packed with trash...). Drove Vehicle and it Works Great. Thanks to all who posted. Chris Pryor Pryors' Transmissions Specialists Eefrit@acsalaska.net

Chris Pryor - Pryor's Transmission
eefrit@acsalaska.net
TRNi Member Since: 1/9/98 (3 | 1)

RESPONSES:



FIX:


Date: Thu Sep 11 14:58:02 PDT 2003
Subject: 4L60E, Intermitent 2nd gear Slips Only-FIX

Wow. Been awhile since i posted this problem. Well the fix was the Pressure Control Solenoid. It was plugged up with trash from the band failure. Put a new one on and havent heard from him since.

Chris Pryor - Pryor's Transmission
eefrit@acsalaska.net
TRNi Member Since: 1/9/98 (0 | 1)

End Of Thread





QUESTION:


Date: Sat Sep 6 09:21:51 PDT 2003
Subject: 4L60E, no second gear
Vehicle: 1994 gmc 1500 pick up, 5.7
Mileage: 13600

PAST REPAIRS;

Original Customer Complaint: long upshifts

Original Codes Present: no codes snap-on scanner

Previous Repairs: none at this time


REPAIRS THIS VISIT;

Current Customer Complaint: never left

Codes Currently Present: no codes

Work Completed: press test ok per astg manual,solenoids voltage & omns checked within specs,harness continuity good,second gear commanded by computer,vss&tps ok,fluid clean and unburnt.reading database found that 2nd gear possible cause? Have not had time to check yet. any other suggestions will be appreciated!

Summary: Customer was on vacation when it first acted up.Took it to nearest repair shop and they added some additive which didn't help.

Dave Westgate -
weslak43@attbi.com
TRNi Member Since: 12/18/2001 (1 | 0)

RESPONSES:


UPDATE:


Date: Sat Sep 6 17:22:37 PDT 2003
Subject: 4L60E, no second gear

Thanks to all who have responded so far. First I would like to appologise for leaving off one zero on the mileage. It should have read 136,000. The customer complaint was shift points were too high. What actually happens is second gear is commanded by the computer but it stays in 1st until it is commanded to third at which time it shifts third and then fourth on schedule. It stays in 1st until third is commanded thus the rpms will reach about 2000 before it shifts third.It doesn't appear to be slipping just holding in 1st even though 2nd has been commanded. Hope this helps to clear things up. Thanks again! Dave

Dave Westgate -
weslak43@attbi.com
TRNi Member Since: 12/18/2001 (1 | 0)

MORE RESPONSES:



POSTED FIX:


Date: Sat Sep 13 07:56:17 PDT 2003
Subject: 4L60E, no second gear

Hi All: After using Joey Cambells advice for checking 2-4 band,found it to be suspect,pulled tranny and found the band worn to metal in several places and drum was scored.Replaced Drum and band. Rebuilt with rubber and papers, new bushings. All seems well! Thank You all for your quick responses! Much appreciated! Dave

Dave Westgate -
weslak43@attbi.com
TRNi Member Since: 12/18/2001 (1 | 0)

End Of Thread





QUESTION:


Date: Wed Sep 17 10:34:52 PDT 2003
Subject: 4L60E, #&%# converter bolts!!
Vehicle: 2000 gmc 1500 2wd, 5.3L
Mileage: 124569 km

PAST REPAIRS;

Original Customer Complaint: n/a

Original Codes Present: none

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: no 3-4

Codes Currently Present: none

Work Completed: still trying to get unit out!!

Summary: Has anyone found a tool that does a good job removing these nasty Allen head torque conv. bolts...this seems to take as much time as the rest of the removal. Leave it to the General to complicate something that was never a problem!!

Dan Faulkner -
mrtnb@efni.com
TRNi Member Since: 9/29/00 (10 | 7)

RESPONSES:


UPDATE:


Date: Wed Sep 17 11:50:41 PDT 2003
Subject: 4L60E, #&%# converter bolts!!

Just an update...finally had to decide to sacrifice the torque. We heated the bolts with a torch and they came out. I expect we damaged the torque but we were running out of options. There seems to be some sort of "lock-tite" on the OE threads. Really would rather find another method than heating these... "hey boss, this thing has a rear main seal leak and now the bell hsg is on fire"!!

Dan Faulkner -
mrtnb@efni.com
TRNi Member Since: 9/29/00 (10 | 7)

MORE RESPONSES:



POSTED FIX:


Date: Thu Sep 18 09:02:12 PDT 2003
Subject: 4L60E, #&%# converter bolts!!

Heat them and replace them with the updated bolts from GM. Thanks all...

Dan Faulkner -
mrtnb@efni.com
TRNi Member Since: 9/29/00 (10 | 7)

End Of Thread





QUESTION:


Date: Tue Sep 30 21:01:27 PDT 2003
Subject: 4L60E, service engine soon light, code 1870'
Vehicle: 1998 chevy c-1500, 5.0
Mileage: 88868

PAST REPAIRS;

Original Customer Complaint: trans slips no revers ,service engine soon light on with code 1870, no comunication from scanner snappy scanner.

Original Codes Present: 1870

Previous Repairs: none


REPAIRS THIS VISIT;

Current Customer Complaint: service engine soon light is on trans shifting fine.code 1870

Codes Currently Present: i can't get codes out snap on scanner will not comunicat with this truck,when we take it to autozone they have a scanner there and they say its still code 1870. component slipping in trans

Work Completed: installed the sonnax part #77754-03k-04k$R2 fix onther probem with the no revers with the reactin shell and replaced all the clutches and seal, and new converter with the woven clutch.

Summary: yes the car was in an accident some time back before i got to it.

James Leal -
jcaphook@aol.com
TRNi Member Since: 5/7/00 (4 | 1)

RESPONSES:



POSTED FIX:


Date: Wed Oct 1 09:45:58 PDT 2003
Subject: 4L60E, service engine soon light, code 1870'

First i need to thank all that responded.Well the problem was in the snapon scanner when you put in the 8 vin # it will ask you yes or no you should answer no if you answer yes it will take you to the 7.0 engine if you answer no it will take you to the 5.0 engine it is a problem with the software in the 2000 primary cartrige s