Re: Roll-up rear window assembly
Is the tailgate rusted around the hinges AT ALL? I had a '76 Cherokee that the same problem. Turned out, the hinges had rust. The door had sagged, putting the window track out of alignment. (A piece of 1/2" steel plate fixed my problem.) Also, rust will affect your ground, since the motor grounds to the tailgate.
1973 J-4000 pickup "custom"
(built-up EFI 4.0, SM420 4sp, Dana 20 t-case, Dana 44 HD front, Dana 60 rear)