Ex fiancee had an early Liberty "sport"
The front axle in that thing sounded like it was going to come apart from day one; and the auto trans was a leftover from the previous year. She had the trans flushed and filled by a chain store. They tried to reset the computer so it would learn the shift points; couldn't do it. This thing shifted with some real violence and at weird RPMs. Ends up Chry-Co's computer would talk to the snap on scanner adequately. I ended up on the phone with the regional chrysler operations office. THEY talked to the mechanic and told him that if he rescans the computer when the car is stone cold; it MAY work. In fact, they were surprised that the tran was functioning properly in the application.
We were able to leave the car over night and the mech was able to drive it early in the morning and reset the shift points.
It took over a week to get this done...I feel your pain
PS; if you have a Chrysler 2.5L 6cyl; PLEASE change your oil with military precision, they are somewhat known for oiling problems and seizing up