Go Back   LS1TECH > CHASSIS, SUSPENSION, APPEARANCE > Automatic Transmission
Sign in using an external account
Register Forgot Password?
Register iTraderTimeslips Photos Members Search Today's Posts Mark Forums Read Used CarsVendor Directory
Search

Automatic Transmission
4L60E | 4L80E | TH350 | TH400 | TH2004R | Powerglide | Converters | Shift Kits
Sponsored by
PerformaBuilt Transmissions

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 01-16-2006, 11:56 PM   #1
TECH Regular
Garage is empty, add now
 
2000SLPZ28's Avatar
 
Trader Rating: 0
Join Date: Mar 2005
Posts: 409
Default 4l60e, slipping in overdrive?

i got a prob. with my auto transmission in my 00 z28. itll shift just fine, untill it goes in overdrive. when it does itll start to slip, so when it does, i take it out of overdrive, then shift back into it, and its alright for a while. if it starts to slip, sometimes ill stomp the gas and make it shift down by it self, when i do that, 2nd gear hits so hard that itll chirp the tires. im thinking it might be the tourque converter, but im not sure. im really lost on this one. any thougts, have anybody else experianced this?
__________________
2000 Camaro Z28 A4
Performance-x-pipe, turn downs | SLP Flowpac | 3.42 gears | LS1 Edit. | Trans Cooler, LT headers...More Mods To Come.
http://i11.photobucket.com/albums/a1...igpicone-1.jpg

1/8th. mile: 8.07
trap speed: 84mph
60' foot: 1.89
2000SLPZ28 is offline   Reply With Quote
Old 01-17-2006, 07:16 AM   #2
LS1TECH & Truck Sponsor
Garage is empty, add now
 
Trader Rating: 7
Join Date: Sep 2005
Posts: 6,301
Default 4l60e slipping in od

its not the converter because you said its fine in the other gears.my first reaction would be band but you said it barks in 2nd.im thinking maybe the shift sol. thats on in forth or maybe the input sprag that should be over running in the od range is getting ready to lock up. call chuck at finish line transmissions..flt is running a 15% off special this month.looks like a great deal!1-630-350-7776

Last edited by da wrench; 01-17-2006 at 09:01 AM..
Vince @ FLT is offline   Reply With Quote
Old 01-17-2006, 08:55 AM   #3
9 Second Club
Garage is empty, add now
 
cablebandit's Avatar
 
Trader Rating: 37
Join Date: Nov 2001
Location: Mableton, Ga
Posts: 7,911
Default

are you sure its not the lockup in 4th slipping? If so, converter lockup clutch could be gone but very unlikely if you are on a stock converter.
__________________
9.29 @ 150 at 14psi
3960# raceweight
OFI s488
Transformance 4l80 with rossler tbrake
408 with etp heads
3.08 rear
Yank PY3400 stall
Bmr everything
cablebandit is offline   Reply With Quote
Old 01-17-2006, 09:20 AM   #4
LS1TECH & Truck Sponsor
Garage is empty, add now
 
Trader Rating: 7
Join Date: Sep 2005
Posts: 6,301
Default

Quote:
Originally Posted by cablebandit
are you sure its not the lockup in 4th slipping? If so, converter lockup clutch could be gone but very unlikely if you are on a stock converter.
good point about the tcc.what if it doesn't do it in third gear? how can it be the converter unless the car has been programed only to lock in fourth.
Vince @ FLT is offline   Reply With Quote
Old 01-17-2006, 09:32 AM   #5
Moderator
2002 Chevrolet Camaro
 
jimmyblue's Avatar
 
Trader Rating: 11
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,033
Default

Misfires will make the PCM unlock the converter.
Presumably you'd see the flashing SES but maybe
not. Misfires might be affected by load (4th vs
3rd).

Now, I've been having a similar sounding problem
recently, the lockup will engage fine/normal
sometimes, but a couple of minutes down the
road it'll flare back to unlocked, then relock,
or sometimes just not engage at cruise for a
while and then (with speed & TPS unchanged)
just decide to lock up. Looking at the scanner
this appears to be the PCM's doing, the TCC
Mode and the TCC action are in step but what
the tables command, is not always done.

So I'm scratching my head about what might
make the PCM decide to not do what I tell it,
at seemingly random times. Other than misfires,
which are logging zeroes in my case.
__________________


2002 SS convertible

SLP Blackwing lid, 85mm MAF, 85mm Professional Products intake & TB, SLP CME, JBAs/Mufflex tubes . SLP Y, McCord cutout, Fuddle 3500/2.0, GM truck pan, '98 flexplate, 3.42s, T-2R, MAC cover, welded tubes, Hotchkiss PHR, springs; BMR bolt-in LCA brackets, K-member; UMI TA, boxed stock 1LE LCAs, SLP Bilstein / Gabriel air shocks (F/R); Strano 35/22 sway bars, 224/224 116 cam, LT1 rad, HPTuners 12.6@112MPH
jimmyblue is online now   Reply With Quote
Old 01-19-2006, 06:02 AM   #6
On The Tree
Garage is empty, add now
 
Trader Rating: 0
Join Date: Mar 2003
Location: Texas
Posts: 137
Default

Quote:
Originally Posted by jimmyblue
Misfires will make the PCM unlock the converter.
Presumably you'd see the flashing SES but maybe
not. Misfires might be affected by load (4th vs
3rd).

Now, I've been having a similar sounding problem
recently, the lockup will engage fine/normal
sometimes, but a couple of minutes down the
road it'll flare back to unlocked, then relock,
or sometimes just not engage at cruise for a
while and then (with speed & TPS unchanged)
just decide to lock up. Looking at the scanner
this appears to be the PCM's doing, the TCC
Mode and the TCC action are in step but what
the tables command, is not always done.

So I'm scratching my head about what might
make the PCM decide to not do what I tell it,
at seemingly random times. Other than misfires,
which are logging zeroes in my case.
Hate to tell ya, but I just got finished going through this very thing.
After a top-end race with a Ferrari, during which I was forced to shift into 4th @ 6750 rpm, simply because I ran out of cam in 3rd, I started displaying HIGH TRANS TEMP warnings. Even though I took the car immediately to a trans shop and flushed the old fluid out, it was already too late, and I had to rebuild it. The 4th gear clutches were burned, AND the band was partially burned.
What was different about this time was that I went for quite a while, after the flush, thinking my TC lock-up was malfunctioning, because it would flare up in 4th gear only, going in and out of lock-up, but in 3rd NO perceptible slippage. After talking to the Vigilante folks, and being convinced their lock-up was fine because it was doing great in 3rd gear, I then took the car to a reputable tuner in my area, who was also perplexed, and spent quite some time with his HP Tuners trying to fix what he thought was a computer problem on lock-up programing...wrong. So, it fooled everyone, me, the reputable tuner, and even the tranny shop at first, until they opened it up, and could see the hard evidence.
Man I tried everything you could think of to keep from having to do the dreaded rebuild again, but finally gave in, and now it's just fine.
It was just so hard for me to believe it was the tranny, because it never slipped at the usual 3-4 shift...it was tight there, but after reaching overdrive, the thing would come out of *lock-up* at the slightest incline I would encounter on any given highway, and at any speed. Crazy, I tell ya!

Sooo, if you guys are having the same symptoms, better get to saving up for a rebuild. Good luck!
__________________
'01 blk C5, with 2002 LS6 engine install, LPE LS6 stg. 2 heads, .228/.588/114+4 cam, ported TB, ported oil pump, MSD wires, tr555 plugs, UD pulley, 3:73 transaxle w/hardened output shaft, Blackwing intake w/Powerduct airbridge and smooth bellows, LG original LT headers w/merge collectors, "X" pipe, & high flow cats/off road pipes, Borla quad Stinger exhaust,Nitto DR's, level 5 auto trans w/Vig 3200 TC, tranny cooler, & LS1 edit.
Other car: 2000 SS Camaro, A4, mucho mods!
black 2001Vette,Nightmare is offline   Reply With Quote
Old 01-19-2006, 07:03 AM   #7
Moderator
2002 Chevrolet Camaro
 
jimmyblue's Avatar
 
Trader Rating: 11
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,033
Default

My problem is showing in 3rd and 4th, and I'm finding
hints that it's misfire related in the logs (although the
misfire counts are quiet, there's an "index level" that
moves in apparent sync). I have a new tune with all
the misfire tables set high, will see if that kills what I
can't quite catch.

You should be able to determine by logging whether
it is a transmission or a torque converter problem,
by looking at engine RPM, input shaft RPM and output
shaft RPM. If engine stretches away from input then
the converter is slipping; if input stretches away from
output then it's some internal friction that's slipping
in the trans.
__________________


2002 SS convertible

SLP Blackwing lid, 85mm MAF, 85mm Professional Products intake & TB, SLP CME, JBAs/Mufflex tubes . SLP Y, McCord cutout, Fuddle 3500/2.0, GM truck pan, '98 flexplate, 3.42s, T-2R, MAC cover, welded tubes, Hotchkiss PHR, springs; BMR bolt-in LCA brackets, K-member; UMI TA, boxed stock 1LE LCAs, SLP Bilstein / Gabriel air shocks (F/R); Strano 35/22 sway bars, 224/224 116 cam, LT1 rad, HPTuners 12.6@112MPH
jimmyblue is online now   Reply With Quote
Old 01-19-2006, 07:07 AM   #8
Restricted User
Garage is empty, add now
 
2001 Pewter WS6's Avatar
 
Trader Rating: 43
Join Date: Nov 2001
Location: Pittsburgh, PA
Posts: 2,669
Default

I had a similar issue last year. Just cruising in OD it would start to slip then grab. It slipped again so I put the car in D and was fine for a bit until it started slipping in D. I gave the transmission to a friend and he had the trans fixed. The input drum was cracked and the clutches were burned.
2001 Pewter WS6 is offline   Reply With Quote
Old 08-29-2013, 03:16 PM   #9
On The Tree
2000 Chevrolet Camaro
 
Justin_2000z28's Avatar
 
Trader Rating: 0
Join Date: Apr 2012
Location: georgia
Posts: 111
Default

my car is doing the same thing, but it only started doing it after i wnet from 2.73s to 4.10s. so i founda good used 4l65e for 300$ so im going to go pick it up. i would build it but im going to rod run and im short on cash lol
__________________

2000 camaro Z28 200,000 |slp lid,bellow|vengence ported ls6 intake|p/p tb |QTP headers | Custom Y| magnaflow cat-back|sortlines/prokit||3.42s| |FTI 3000 stall |sid neal built 4l60e| |LSXperts tune|. iron block ls2 build in progress
Justin_2000z28 is offline   Reply With Quote
Old 08-29-2013, 03:16 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
2000, 308, 4l603, 4l60e, 4th, camaro, fourth, gear, lockup, ls1, overdrive, rpm, slipping, transmission, z28


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 05:21 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.5.2
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details