Until about 8 years ago, the only mechanical parts that I had not touched on any vehicle was the differential and a transmission.
The first rebuilt and upgraded differential has been working fine since then (1954 torque-tube 3.55 R&P and new bearings/bushings/ seals). I did this with a knowledgeable and talented friend (who was awed by the torque-tube) - smooth, quiet, fuel-efficient operation.
I had my 1954 Hydra-Matc transmission rebuilt by am eccentric professional. I'll probably have my 3-speed also rebuilt by a pro.
