2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 96Get this manual
8Install the 1st driven washer (left side) onto the shoulder of the splined shaft; then install the 1st driven bushing and gear CD348
7Install the 4th driven gear onto the driveshaft making sure the four small dogs are facing toward the 3rd driven gear as noted in disassembling; then secure with the snap ring