1983 Ski-Doo Shop Manual, Page 176Get this manual
SECTION 03 TRANSMISSION SUB-SECTION 07 (CHAINCASE)
REMOVAL
suspension injection oil reservoir (if applicable) battery and battery holder (if applicable) chaincase cover and drain the oil
Pry out drive axle oil seal from chaincaseRemove cotter pins, nuts, washers, sprockets and chain Remove bolts and nuts securing chaincase to frame
INSPECTION