Originally Posted by
stiltskin
I ran mine stock with the 20k for a few runs before switching to the 10k. The lighter oil gave me more steering which could be loose on some surfaces. I stayed patient and let the diff wear in naturally and they both feel good. You can still feel the gears when you roll it, but they are smooth and consistent. Be careful with removing shims. You may like the feel better in your hand, but you also risk stripping the gears from an improper mesh.
Pretty sure this is the case with my gear diff
from factory it had one shim less than what the maintenance kit instructions state
and it let go big time when I needed it most
was fine in the practice days leading upto the event then in the qualies it let fly
my next one will have the extra shims it should of had from factory