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I tested every contact point in the wire harness while connected to the TCM. I tested DC volts from the contact point to ground. Here's a diagram of the readings I got. #4 connector to throttle position is 1V, increases to about 4 when I press the gas pedal. To reiterate: 42re auto trans, 1994...

I tested every contact point in the wire harness while connected to the TCM. I tested DC volts from the contact point to ground. Here's a diagram of the readings I got. #4 connector to throttle position is 1V, increases to about 4 when I press the gas pedal. To reiterate: 42re auto trans, 1994...

Changed the two solenoids and got no difference. I'd like to re-consider the problem: not that the transmission won't go into overdrive; it seems it's not being directed to ever go into overdrive. This has got to be the key symptom: the light over the O/D OFF switch always stays on when the...

That's what we're all looking for, isn't it : a common problem that's easy to fix. Thanks Bounty Hunter, I'm off to learn about solenoids.

From all my research it seems it's a puzzle to calculate your model jeep, amount of lift to determine the right replacement wheels, backspacers, tires to complete the project. I hope this thread can be a welcome place to tell your successful combinations. I also hope someone will tell the...

On more thing. I learned that when you replace the TCM, there's an electronic device that syncs it to your trans...something about optimizing shifting. This car had a recently replaced trans when I bought it...could not syncing it to the existing TCM when installed cause this?

I've been trying to figure out why the jeep won't go into overdrive. 15 mpg is not doing me any good. The O/D OFF switch is a pushbutton, with a light above it that lights when you opt for no overdrive. I pulled the wire harness off the back, and drove: no overdrive. I then connected the wires...

I spent last night putting 2.25" lifts on the front of a 94 Grand Cherokee ZJ, without coil compressors. I'm not doing the back until I get a pair. I improvised with a strap clamp, boards with c-clamps, prybars. My hands are all cut up and I have a black eye. But the jeep looks nice!