I'm noticing a pronouced shake/shudder from my junkyard 9.25" accelerating around tight right-hand turns, especially up slight hills. Is this normal chatter/shudder from the limited slip? I put in fresh synthetic 80w-90 and some off brand limited slip additive from autozone a few days ago but maybe it wasn't the right stuff?

 

could be worn spacer washers or ring and pinnion being worn that is my guess your said you got it out of a reck yard being a 9 1/4 it probly has seen heavy use