1989 Ski-Doo Repair Manual, Page 338Get this manual
Section 03
TRANSMISSION
(GEARBOX)
Sub-section 08
The most recommended method is to removo suspensions, tracks, drive axles then drive chain and thereafter, re-install genuine endless chainGearbox components repair can be performed without removing drive chain as follows:Using hammer, gently push bearings out of layshaft ends- Using hammer, gently push bearings out of drive shaft ends
Remove the circiip, the distance ring, the shim, the shift sprocket (19 th), the needle bearings, the distance sleeve, the washer and the shift sprocket (23 th) from shaft
CLEANING
8,63, Gearbox housingcover
Clean mating surfaces of cover, top and bottom of gearbox and frame
NOTE: Should these bearings can not be removed, drive chain removal is needed in order to withdraw layshaft and drive shaft from gearboxThen, use bearing extractor tools as explained farther in this section- Remove four layshaft studs from gearbox (driven pulley side)Take drive shaft off (remove more stud(s) if required)Take layshaft off (remove more stud(s) if required),Remove gearbox and gasket from frame