01 grand cherokee - JeepForum.com
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post #1 of 4 Old 11-08-2013, 08:03 AM Thread Starter
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01 grand cherokee

Have an 01 grand cherokee 4.7. It runs good in park but once i put it in gear the speedometer jumps all over the place then goes up to about 120 and shuts off the jeep. No codes show up for the engine or the transmission. Any idea?

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post #2 of 4 Old 11-08-2013, 06:33 PM
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Check for broken vacuum lines and pvc hose... spray starting-fluid around while the engines running/ or do smoke test.
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post #3 of 4 Old 11-14-2013, 12:08 AM Thread Starter
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I couldnt find any leakes and its still doing the same thing.
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post #4 of 4 Old 11-14-2013, 02:06 AM
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possible TCM fault.

before my TCM completely died my speedometer would jump up and down all over the place then go back to 0

you may want to take it to the dealer and have them re-flash the TCM
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