So I just bought this 2000 jeep cherokee sport 4x4 4.0L automatic. As I am driving it all of a sudden it stops accelerating. I press on the gas and the engine revs up but I do not go any faster. I pulled over to try and figure out what is going on with no luck. I can place the trans in 1.2.D. or R and it wont move at all. I also tried switching from 2H to 4L and 4H and still nothing. I can push it in neutral so I know the brakes are not locked up and I checked the transfer case and trans fluid levels both of which were fine. Does anyone have any idea what could be the problem?