While riding at 65 - 70 mph the tach periodically jumps from 2100 to 2500 rpms and back. Transmission fluid is clean and full.
Nov 6, 2011 at 10:45 PM
2004 grand cherokee engine periodically revs when in overdrive
2004 JEEP CHEROKEE
JBMELITSKI
- MEMBER
- 4 POSTS
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BILLYMAC
- ✓ASE Certified Mechanic
- 2,204 POSTS
Hi this undoubtedly a trans slip possibly caused by the trans or a input output sensor. or computer. you will need to have trans scanned for fault codes this will tell you exactly what is happening.. good luck
Nov 6, 2011 at 10:51 PM
I have seen a erratic throttle position sensor cause the torque converter clutch to disengage and engage causing a 200-300 rpm surge. I would look into that first - it usually only fluctuates a couple of 1/10ths of a volt while the throttle is steady which wouldn't trigger a trouble code. I've seen this on a few Grand Cherokees with the 4.0LI6 and the old 42re trans.
Nov 8, 2011 at 3:55 AM
BILLYMAC
- ✓ASE Certified Mechanic
- 2,204 POSTS
Mikey is right . I am sorry i mis read your post torque lock up is most likely the prob.
Nov 8, 2011 at 5:41 PM
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