Transmission not locking up.
Thread Starter
Pro
Joined: Feb 2002
Posts: 565
Likes: 2
From: Chandler AZ
Transmission not locking up.
Had my trans. rebuilt two months ago and just hooked it up to my Auto-X scanner for something else and noticed that the torque converter wasn't locking. Is this electrical or mechanical in nature? Either way I guess it's back to the rebuilder. Thank goodness for warranties. Thanks in advance, Robert 
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I believe your '94 has OBD-I and a 4L60 (not 4L60E) A4, so here's some info on the workings with a 700R/4.
If the ECM is not sending the lockup command to the TCC relay the problem could be due to lack of VSS signal.
If the command is present (ALDL pin F at 0 Vdc) and still no TCC lockup, the TCC/CRUISE BRAKE SW may be faulty.
If the ECM is not sending the lockup command to the TCC relay the problem could be due to lack of VSS signal.
If the command is present (ALDL pin F at 0 Vdc) and still no TCC lockup, the TCC/CRUISE BRAKE SW may be faulty.
Burning Brakes
Joined: Nov 2002
Posts: 1,239
Likes: 1
From: Las Vegas NV
Originally Posted by Quiktrp94
Had my trans. rebuilt two months ago and just hooked it up to my Auto-X scanner for something else and noticed that the torque converter wasn't locking. Is this electrical or mechanical in nature? Either way I guess it's back to the rebuilder. Thank goodness for warranties. Thanks in advance, Robert
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
Thread Starter
Pro
Joined: Feb 2002
Posts: 565
Likes: 2
From: Chandler AZ
Thanks for the input. It's a 4L60E and they put in Red Eagle kevlar bands. Two days after picking it up one of the soft lines that they used to install the new cooler with was cut by the bad flare job that they did. I lost over 4 quarts of fluid before I noticed that all the smoke was from ME. They cleaned up and repaired the line but I didn't know if this may have caused the torque converter problem. Well, first chance I get it's back to them to check it out. Thanks again, Robert
Instructor
Joined: Jun 2001
Posts: 132
Likes: 0
From: Monroe Washington..the State
Well you can rule out the VSS because a 4L60E will not shift with out one 
AT ALL!
Many things can cause your issue. Yes the pump can but None of you ever want to pay for a new one So SONNAX came up with a bore kit to fix it. Then again there are a few bore in the Aluminum Valve body that will cause many strange issues.
94 was a NON-PWM year so lock up is just on and off. many of thiese issue do not affect 94s like they do 95 up cars.
Being you are not seeing a Signal in the data stream it is more then likely going to be an electrical issue.
Coolant Temp sensors(engine and trans) can cause this along with mis fire issues.
Good luck!
AT ALL! Many things can cause your issue. Yes the pump can but None of you ever want to pay for a new one
So SONNAX came up with a bore kit to fix it. Then again there are a few bore in the Aluminum Valve body that will cause many strange issues.94 was a NON-PWM year so lock up is just on and off. many of thiese issue do not affect 94s like they do 95 up cars.
Being you are not seeing a Signal in the data stream it is more then likely going to be an electrical issue.
Coolant Temp sensors(engine and trans) can cause this along with mis fire issues.
Good luck!
