2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 267Get this manual
FINAL DRIVE DisassemblyInspection NON ADC
1Drain and properly dispose of used oilRemove any metal particles from the drain plug magnet2Remove bolts retaining the outer cover plate assembly4Remove the output hub assembly from the outer cover plateInspect the bearing and contact surfaces of the output hub for signs of wear or damageReplace component if found to be worn or damaged Output Hub Assembly