Any Insight would be great. Have a 1990 XJ Loredo. 4.0 with the AW4. I went wheelin a while back and the jeep worked great. Drove it all the way home from barstow to Palm springs. Again worked fine. Hopped in and was gonna go wheelin again and the tranny no longer shifts. (Starts in 4th). I said "shit, gonna have to replace the tranny". I replaced the tranny. Same problem. Replaced the throttle position sensor, same problem. Been through 3 tranny computers. I'm at a loss. ??? Any help would be appreciated.

Thanks
Josh

Oh. Tranny shifts fine manually with the computer unplugged.

Is Your Only Issue In The AW4. There is Obviously A Communication Issue Between the Trans Control And The Trans. May Have A Bad Ground Or Pinched Wiring.
I Hate to Say It But You May Need To Do Some Wire Chasing. Start By Looking For Any Obvious Places In The Convolute Where It Looks Like It Is Crushed Or Pinched.

Good Luck.