everybody on here changes things diffrent on here ,with diff oil etc.
i change my diff oil about. 4 races depending on how dusty the track is,
on the shocks if the track is rough proberty 4 races also.
as for the clutch bearings i just check them after a week of raceing and if, there smooth no need to replace them. and i do check the wheel bearings, and diff bearings and i do the same with them also.