GC 4.0 2000 tranny problems (I think)

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02-13-2010, 06:26 AM

oujea

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GC 4.0 2000 tranny problems (I think)

I have Jeep GC 2000 4.0 L6 and I had some problems with tranny: sometimes it drive in LIMP mode (no 1st and 4th gears), and on diagnostics I had 743, 748 and 753 fault codes. I bought following parts:

- Overdrive solenoid assembly
- Pressure sensor transducer
- Governor solenoid
- Output speed sensor
- Filter

And I replaced it, also changed fluid. But I had again same fault codes and again Jeep sometimes goes in LIMP mode.

I turn off the engine and restart it and then transmission isn't in LIMP mode. Sometimes I have to restart engine few times to exit LIMP mode.

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02-13-2010, 08:31 AM

oujea

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Is it possible that I have mechanical fault in transmission?

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02-13-2010, 06:09 PM

Willys55

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Model: Grand Cherokee

You are looking at chasing an electrical fault. Either in the 8 pin connector on the trans, wiring in the trans, or from the 8 pin connector to the PCM and trans control relay. Good Luck.