I have a '41 AK that the clutch, driveshaft/torque tube and rear end were rebuilt last year. They had a real problem with the driveshaft and a bushing in the torque tube. Had to have the machine shop get involved. Something about a bushing getting pressed out and a new one made and installed.l

Everything worked fine for awhile and then I started getting a "ratcheting" noise from driveline when slowing down. The shops both said was just a "self clearing" issue . That has got much better. Now I have a vibration in driveshaft at 45 mph and above. Doesn't sound or feel like a U-joint. Only happens at speed and goes away when below 45.

The shop/mechanic who did the work is not longer available to ask. Any suggestions ? I have already thought about not going above 45, but I put the 355 gears in to be able to cruise at 55.