Question about 1999 Jeep Grand Cherokee
Transmission won't shift when cold
Lots of reasons.
but one easy one, the filter is dirty, not letting mover viscous. ATF pass through it., do the 50k service, and bam.
Posted on Mar 25, 2014
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Posted on Jan 02, 2017
What is happening is your loosing pressure at the front servo. The seal round it is swelling up as it warms up and the problem goes away. The best fix is to rebuild the transmission. If that is not in the budget, there are some cheaper solutions. First you could add some trans tune. Any parts store will have some variation of it. If that does'nt work a very small amount (a cap full or so) of brake fluid should. It will cause the seals to swell. I would recommend,after adding brake fluid, having the transmission flushed after driving the truck 50-100 miles. Hope this helps.
Posted on Feb 09, 2009
sounds like either a bad speed sensor or controller. shift points are too high, should be at 2000 or slightly less. if fluid is good and clean and shifts do not flair, check those control units. Not sure about calibrate...could mean out of calibration...Id ask
another tech about that. (i don't know everything!)
Posted on Mar 12, 2009
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