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Unread 11-08-2013, 08:03 AM   #1
jonpar84
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Join Date: Nov 2013
Posts: 3
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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Unread 11-08-2013, 06:33 PM   #2
new2site
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2002 WJ 
 
Join Date: Jan 2012
Location: Orange county, CA
Posts: 795
Check for broken vacuum lines and pvc hose... spray starting-fluid around while the engines running/ or do smoke test.
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Unread 11-14-2013, 12:08 AM   #3
jonpar84
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Join Date: Nov 2013
Posts: 3
I couldnt find any leakes and its still doing the same thing.
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Unread 11-14-2013, 02:06 AM   #4
link375
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2001 WJ 
 
Join Date: Nov 2013
Location: Provo, UT
Posts: 95
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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