Noisy differential

["Steve Gorr" <sgorr2@comcast.net>]

Well the 78 B's rear end makes rather disconcerting noises when backing off
the gas. I have just replaced the 4 thrust washers, star gear phrenolic and
the 2 brass cupped ones but the noise is still there, but the small clunk is
gone. The only thing I can think of would be the 2 bearings on the main pinion
gear that the drive shaft connects to. Any ideas?