2008 Arctic Cat ThunderCat ATV Service Manual, Page 17Get this manual
Front DifferentialRear Drive Lubricant When changing the lubricant, use approved SAE 80W-90 hypoid gear lubeTo check lubricant, remove the rear drive filler plug; the lubricant level should be inbelow the threads of the plugIf low, add SAE approved 80W-90 hypoid gear lubricant as necessaryTo change the lubricant, use the following procedure1Place the ATV on level ground2Remove each oil fill plug
737-651B
4After all the oil has been drained, install the drain plugs and tighten to 45 inlb5Pour the appropriate amount of approved SAE 80W-90 hypoid gear lubricant into the filler hole6Install the fill plugsNOTE: If the differentialrear drive oil is contaminated with water, inspect the drain plug, filler plug, andor bladder
! CAUTION
Water entering the outer end of the axle will not be able to enter the rear drive unless the seals are damaged