oxfordgt

Grinding noise at slow turns is 1 of 2 things. Axle bearing or wrong amount of friction modifier. I'm leaning towards the friction modifier. If this was a real shop doing the rear end install they should have told you how much they put in and to report back to them. With out the right amount of friction modifier the LSD clutches will not slip like they are supposed to and chatter which you hear as a grind.

01S2Roush

Axle bearings are new. Friction modifier was in the royal purple gear oil. Grinding is so bad now I can feel the car shake from it when backing out of the garage. Nothing left to replace, I did it all. I refuse to go to a garage, just finished taking pictures putting up for sale today, giving up. Thanks anyway guys.

oxfordgt

You still have to add friction modifier with royal purple.