1972 Ski-Doo Shop Manual, Page 81Get this manual
GEAR BOX 11Release drive xle sprocket teeth from track notches while at e same time, pulling the drive axle towards epO bearing side of frameThis action will disengage the axle splines from the lower sprocket of 'the gear boxAllow drive axles to remain within the track area12Remove six(6) nuts securing gear box to frameRemove gfJar box and gasket (fig1-13-5) 1-13-03
A Gasket