2004 Arctic Cat ATVs factory service and repair manual, Page 453Get this manual
7Secure the pinion gear in bearing puller; then remove the pinion bearing using pressAccount for collar, bearing, and shim CC876
6Using the Pinion GearIShaft Removal Tool (pln 0444-127), and hammer, remove the pinion gear from the housing
I 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 categoryI NOTE: If the housing is being replaced, proceed to the following Shimming ProcedureIShim Selection sub-section