GMC transfer case

[Scrambler]

Our GMC CCKW 'Split' has a problem with the transfer case. I can go to third gear, speed about 10 mp/h, transfercase-gear will jump out every ten feet or so. Somebody told me because of the torque bars are having play so the rear axles were coming foreward which had caused a bearing inside the transfer case broke... is this possible? I know I have to take it apart but right now it is still mounted so I still can move it.. Where other do I have to look for when taken apart? Another transfercase is hard to fing over here; I don't know of another. parts such as a bearing might be easyer...?
1943 CCKW 'Split" dump truck (in the Netherlands, Europe)

 

[NDT]

Sounds like the spring in the ball poppet in the shift rail may have broken. The story about the torque rod movement breaking the bearing is unlikely.