Originally Posted by
aaron_buran
We also learned that you can't run the new 2 speed shoes on the old 2nd gear spur(has alum lining), it will gull on the shoes. You have to run the new steel lined 2nd gear with the new shoes. The old assembly/shoes from the 05 car work on the M3 with the old gears.
Shhhhhhh - don't tell my car, all i've run is new shoes and old gears and all I've seen is a small amount of material transfer from the aluminum just like always.