It has to be the drive shaft that is why it moved up in speed when you changed to the cruiser rear gear. The yokes may be slightly out of align. I would put a whole different drive shaft in it.

Its not the engine or you could bring the engine up to the rpm it vibrates at setting still and you would feel it. Its the drive shaft.

Last edited by dannysbee; 10/01/08 06:17 PM.
Getting old just means you were smarter than some and luckier than others.