Ujoint's were replaced with the drive shaft balance on Tuesday and Installed yesterday. Ive driven the truck maybe 4 miles. Everything was greased.Do the vibes go away when you grease the u-joints?
Do you have any play in the rear output flange? Side to side, up/down, forward/aft?
no noticeable movement from the output flange. I'm thinking its the bearing on the case differential spool.