4t60 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-29-2010, 11:02 PM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2010
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
robertlopez23 is on a distinguished road
Default 4t60

I have a 1996 pontiac grand am 2.4l with a 4t60 trans that will not keep the tcc engaged.I have already replaced the valve body,computer,and torque converter itself.Is it true that these transmissions have an accumulator for the converter?
robertlopez23 is offline   Reply With Quote
Old 06-30-2010, 07:25 AM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

There are a couple things with the PCM that will not allow TCC lockup.

If the engine has not warmed up to a certain temp.
If the transmission has not warmed up
If you have a faulty brake switch, it will prevent TCC lockup.

Have you scanned for any codes?
Mike is online now   Reply With Quote
Old 06-30-2010, 10:28 AM   #3
Senior Member
True Car Nut
 
95naSTA's Avatar
 
Join Date: Feb 2003
Location: Philly
Posts: 4,508
Thanks: 0
Thanked 0 Times in 0 Posts
95naSTA is on a distinguished road
Default

Also, Inconsistant timing will disable lock up. (Knock)

Was the TTC solenoid replaced with the valve body?
95naSTA is offline   Reply With Quote
Old 06-30-2010, 12:15 PM   #4
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Mike and Mike, could an incorrectly adjusted TV or whichever adjustable cable is on the 60 cause any lockup problems?

I know so litle about the 60....
BillBoost37 is offline   Reply With Quote
Old 06-30-2010, 02:33 PM   #5
Senior Member
True Car Nut
 
95naSTA's Avatar
 
Join Date: Feb 2003
Location: Philly
Posts: 4,508
Thanks: 0
Thanked 0 Times in 0 Posts
95naSTA is on a distinguished road
Default

I'm assuming this is a 4t60e since it'* a 96 so there would be no TV cable. Do you mean the gear selecting cable?
95naSTA is offline   Reply With Quote
Old 06-30-2010, 03:27 PM   #6
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Nope, I meant the non-existant cable. It'* not that often that I work on one and therefore I was hunting for other ideas that didn't exist.
BillBoost37 is offline   Reply With Quote
Old 06-30-2010, 07:51 PM   #7
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Bill your confusing me now???

Anyway, a bad TPS can prevent TCC lockup too, but your engine would be hesitant at the same time. Ummm, possible a bad IAT sensor too??
Mike is online now   Reply With Quote
Old 06-30-2010, 09:37 PM   #8
Junior Member
Thread Starter
 
Join Date: Jun 2010
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
robertlopez23 is on a distinguished road
Default

the converter is engaging but will only stayed engaged for a few seconds making the engine surge between 2000-2200 rpms at highway speeds.I have replaced the knock sensor because when I was removing the trans. I broke it accidentally.I also used the entire valve body out of a salvage vehicle(solenoids included).It doesnt have any codes!It seems to me that the computer itself is causing the surge since I tapped into the TCC and TCC PWM solenoids and the computer grounds these at the time I feel the surge.But the computer itself was replaced out of a salvage vehicle as well.
robertlopez23 is offline   Reply With Quote
Old 06-30-2010, 09:50 PM   #9
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Are you able to monitor the line voltage on the TCC engage circuit while driving? I'd like to see if its the PCM making the TCC unlock/lockup.
Mike is online now   Reply With Quote
Old 06-30-2010, 10:02 PM   #10
Junior Member
Thread Starter
 
Join Date: Jun 2010
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
robertlopez23 is on a distinguished road
Default

Is have not tried to hook up any fluid pressure gauges to the transmission yet.Where is the line pressure tap on this transmission?Voltage to the TCC solenoids stays at battery voltage the entire time the engine is running.
robertlopez23 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Final drive for 3.33 4t60, 3.06 4t60, 2.9x 4t65-HD 95naSTA 1992-1999 7 09-27-2005 02:17 AM
Trans physical mounting locations 4T60 vs 4T60-E JaxxMan 1987-1991 14 10-27-2003 09:21 PM
4t60-e brian89gp General GM Chat 18 07-14-2002 12:56 AM


Tags
tcc

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 Off
Refbacks are Off



All times are GMT -4. The time now is 11:36 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.