Who has Dr. Diff 8 3/4 rear discs? Pt. 2

They will take a while to break in and have everything be flat to the rotor surface. The way the calipers move when applied means that it will not wear evenly from day one. I doubt everything is perfectly flat. I needed to drive mine a little before that happened also. They will work better after they break in.

If you have an adjustable proportioning valve, also make it wide open for now.