Rear seal is replaced by first removing the ujoint then transmission yoke, then simply remove the 8 bolts and remove the rear bearing cover, nothing will fall out unless you have removed the top loader (shift cover)and then tipped the rear of the transmission down then the rear mainshaft bearing and shaft could slide back and could drop the needle bearing out of the clutch gear. Tap out the seal of the cover and replace. Sometimes the yoke will be grooved from the seal, try and press and position the new seal so it is on a fresh ride on the yoke. It is good to lightly polish up the yoke with some fine emery paper and wd40 too.

Steve

Last edited by sstock; 07/09/2019 11:37 PM.
1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration