Automatic transmission lock-up problem

clutches
#1

The lock-up clutch in the automatic transmission in my 1998 Jeep Grand Cherokee will momentarily and randomly disengage when driving at a steady speed on level roads (initial discussion approx 1/9/09) and I would like to buy a good transmission book/manual to check-out/investigate some of the possible causes suggested to date. Please inform me where I can find this type of book/manual.

#2

Before going through all that, make sure the brake light/interlock switch isn’t the problem.

You know that when you step on the brake pedal the lock-up torque converter disengages? If you have a switch that’s effected by vibration and turning the brake lights on and off, the same thing happens with the torque converter clutch.

Tester

#3

Thanks for your suggestion - how can I determine if this is the cause of my problem?

#4

The next time the TCC starts disengaging, slip your left foot behind the brake pedal and lift up on the pedal. If the TCC remains engaged there’s a problem with the brake light switch.

Tester

#5

Why did you start a second thread on the same subject? We addressed the brake light switch in the last thread…

transman

#6

I appreciate the suggestions on my first question (i.e. disengagement of the the lock-up clutch) but now I am searching for a suggested transmission book/manual that I can use for following up on the initial suggestions and troubleshooting techniques.