When I backed out of a parking spot, put the tranny in drive, the OD light will came on and the tranny will slipped. The first time it happened I then put it in 1st and drove off, manually going through the gears and everything worked that way. I then came to the next stop light turned the jeep off, then back on. The OD light turned off (which is normal) and everything worked as it should. This has now happened on a coupe rare occasion and turning off and on solves my problem.

I pulled the tran code and it list 21, which is Governor Pressure Solenoid Output. From what I have read this code usually comes up when the tranny is stuck in 2nd or 3rd. I could not find anyone else with tranny slipping. I am not sure what to replace or where to start, any help would be great.