It has to be the PA Gremlins. Been working on my Jeep rear differential putting in a Pinion Bearing. I have had 2 different rear end guys come and tinker and still sounds like I have massive snow tires on going down the road and when you let off the gas there is a whine. Second guy does rear ends and used dial indicators and everything and says it is all within specs. I am wondering if someone sold me a bad bearing. All new bearings and new crush sleeve.
It has to be PA Gremlins