1985 Ski-Doo snowmobile Service Manual, Page 321Get this manual
Section 03
TRANSMISSION
(GEAR BOX)
Sub-section 08
INSTALLATION
Gear box assembly
Position gasket on frame studs and place lower sprocket in drive chainSecure gearbox to frame Set the shifter lever In
68, Chaincase oil
Fill gearbox with 450 ml (16 Imp ouncesl of Bombardier chaincase oil
Adjustments
Shifter arm position
Set the shifter lever to NEUTRAL position, turn driven pulley clockwise and adjust shifter arm position using the adjuster screw located at the RHtransmission cover portionThis will ensure the transmission is perfectly adjusted
REVERSE
Install the shifter rod to the shifter lever