i have a 88 ram 50 4x4 2.6 g54b with the km145 transmission, i bought a 90 ram 50 4x4 2.4 with the km145. The output shaft is different is there any other known differences? my problem is that the clutch wont disengage. to make it clear when i push in the clutch it doesn't do anything. the cable is good and its moving the throw out arm on the transmission, any ideas. is it possible the clutch is stuck since its been sitting up for 6 months or is something different about the transmission?