Three problems related to transmission gear slipping have been reported for the 1998 Jeep Grand Cherokee. The most recently reported issues are listed below.
Heard noise coming from rearend and transmission slipped. Took it to petri Jeep in scottsdale, az. They said bearings were worn out in rear diff and transmission needed to be rebuild. Ok, they fixed it, at 71000 miles. I think this was way too soon. The Jeep now has 88000, the transmission is acting up again and the humming noise is returning. At 75000 my extended warranty expired. Im not happy!!!.
Transmission slipped from park to reverse with engine idling. Car rolled backwards and damaged driver's side door when it struck a fence post.
Fuel sending unit failed. As a result: the check engine light will not go off, therefore I can not pass emissions test in my state. I am also constantly running out of gas. The sending unit is necessary for correct gauge readings. This has happened at the worst time for me as a single mother suffering from job losses in the state of goergia. The estimates to repair the fuel system has averaged 700. 00 dollars I am also filing a complaint about the transmission that slips too. The transmission will not go into 2nd or 3rd gear with out a lot of extra effort. There are times I have to take back roads and access roads just because I was nearly hit several times trying to access the express way. SUV's are horrendous in gas mileage but a SUV with a slipping transmission is burning even more gas! I am still trying to pay for the car and can not afford the repairs. I wish I would have bought an import. I have met quite a few Jeep owners who have experienced the same problems.