2008 Arctic Cat ThunderCat ATV Service Manual, Page 128Get this manual
Rear Gear Case REMOVING 1Remove the left-side rear A-arms (see Rear A-Arms in Section 7)2Remove both of the rear drive axles (see Drive Axles in this section)3Remove the four cap screws securing the engine output shaft to the rear gear case input flangeGZ183
2Remove the clutch pack from the clutch basket; then remove the snap ring securing the clutch basket (A) to the input shaft (B) and remove the clutch basket
4Remove the two cap screws and lock nuts securing the rear gear case to the frame; then remove the gear case through the left side