2008 Arctic Cat ThunderCat ATV Service Manual, Page 117Get this manual
NOTE: If gears are being replaced, use the existing shimsThe numbers are scribed onto the gears: the ring gear has the number on the opposite side of the gears, and the pinion gear has the number on the end of the pinion gear shaft by the splinesIf no number is present, it should be considered as being in the categoryNOTE: If the gear case housing is being replaced, proceed to the following Shimming ProcedureShim Selection sub-sectionCC875
Shimming ProcedureShim Selection 1Press bearings into bores by outer ring to hard contact with seat2Install the lock collar and tighten to 125 ft-lb; then on final assembling, stake the lock collar edge approximately 1.5 mm into the lower oil channel