So you are saying, A/T transmission problems.
do elaborate, its a complex system there.
does reverse work ok.
did you check fuses first.
then check AFT fluid levels using oper guide method not guessing?
scan it yet, using any cheap scan tool (you or any shop)
if you see p07xx errors (DTC) those are real, post em.
last is a full flush and filter. inside,
the transmisson may be electronically shifted, like the AW4 is,
you never stated what trans is there, and that does matter.
if inputs to the TCM are wrong it will not shift at all.
SOURCE: 97 jeep cherokee electric fan problem
sound like coolant temperature sensor is open or not working.scan it to see when engine get operating temperature when coolant temperature get 190 degrees the coolant temp sensor should show 190 degrees if it shows 80 degrees or lower it not working replace it.the coolant sensor control coolant fan.when it gets hot it resistance changes or lower.the pcm grounds it .then cooling fans will run.
SOURCE: 2005 Jeep Grand Cherokee Shifting Problems
Check the Trans fluid level with it running and at operating temperature. Jeep NAG1 transmissions are known to have the input electric seal leak trans fluid. Not an exspensive fix add Mopar ATF4 and then relace the guild seal.
SOURCE: Jeep 1997 Wrangler. Gear shifting very hard
synchronizers are going bad a used trans would be cheaper than a rebuild due to the labor involved
SOURCE: My 1997 Jeep Grand Cherokee cuts off while I'm driving.
low or no oil pressure bad-- knock can be damage from no oil rod knock, wrist pin, piston or spun bearing-or oil pump damaged in oil pan
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