I did not end up installing my new ES Poly Diff Bushings because: #1-PITA. #2-Stocks were in pretty good shape. #3-I'll drop my subframe sometime in the future for adding subframe spacers and figure I'd do Diff Bushings at that time while the car has to be down for a while. Also, I want to see the differences: With Leader Gears and stock bushings versus ES Polys. So far, I have not noticed any difference in noise coming from the rear end. GPA