Okay, M6 vibration only when coasting on the expressway at like 70-80 mph. Seems to almost go away when gas is pressed. But when let off huge vibration.

poly transmount... shimmed for plate height (maybe this is the problem)

LS1 driveshaft doesn't help...had mt steel one rebalanced and new u-joints, neither

just had a 4.10 put in and all new bearings put in (no cure) only bearings that were not replaced were the outside axle bearings near the axle ends

did notice one axle was alittle scared, but not sure if that is a vibration cause.

T56 was rebuilt

 

ttt bump