Transmission won't shift when in drive

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12-03-2021, 01:04 PM

#16

boxburn

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Join Date: Oct 2018

Location: United Kingdom

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Year: 1995 RHD

Model: Cherokee (XJ)

Engine: 4.0l

Quote:

Originally Posted by CHGreen01

The insulation on every wire is totally rubbed off in that area where it was routed behind the clamp. Maybe they were just grounding out against the side of the transmission. I'm going to repair the harness and see what happens.

A likely culprit. Let's hope it hasn't caused damage.

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12-13-2021, 08:30 AM

#17

CHGreen01

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Join Date: Mar 2018

Location: ATL, GA

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Year: 1995

Model: Cherokee(XJ)

Engine: 4.0

SOLVED!

Just an update for those who are interested. I repaired the harness for the 7 way connector where the insulated had been rubbed off behind the clamp on the side of the transmission. After reinstalling, there was no change. I was still getting voltage of around 7.5V on each C14/15/16 with the jeep in park, key on, connector unplugged. Then when I would plug the connector in the voltage would drop to zero. Still stuck in 4th gear in drive.

I ordered a new TCM off ebay and installed it. Now everything works properly! Transmission shifts great in drive.

I assume that when I was doing the engine swap and moving the transmission around that the harness got moved around just right to cause a short where the insulation had been damaged. It must have burned up a driver in the TCM. After repairing the harness and replacing the TCM everything is working properly.

Thank you all for the help!