I have a '53 GMC 1-ton. It had a SM420 behind a 235. The SM420 has a fixed yoke on the back, and the truck had a 2-pc driveshaft. The driveshaft had a slip-joint on the back shaft, next to the carrier bearing which also slides inside the bracket. So the driveshaft had "give" at the slip joint and the carrier bearing.. Now, fast forward to today. I just swapped out the old SM420 to a new T5, which has a slip yoke. So now my driveshaft has 3 "give" locations. The slip joint on the back shaft, the carrier bearing and the transmission yoke. When I drive it, the shaft is moving fore and aft and rubbing on the collar for the carrier bearing. I'm not sure what to do. Thinking out loud, I debated about drilling and pinning the back slip joint, but my fear is that it would then shove hard on the carrier bearing. Does anyone have any thoughts? I've never had a carrier bearing that slid inside its housing, so I'm wonding what would happen if I had it changed to a fixed carrier bearing?
