1974 Ski-Doo Shop Manual, Page 57Get this manual
Divide di screpancy by two and install that amount of shim on gea change shaft Install shaft into upper housin Install standard shim and balance of shims on gear cha nge shaft In stall gear change lever on shouldered end change shaft so that lever and vent plug hole form 45 degree ang leIn!all was her and nut Torque to 17 ftlb At "reverseposition, sleeve must be as shown,
REV ERSE PO SITI ON
If any of these positions are unobtainable, use sc rew driver to turn index rod and obtain proper mes hing of teethRecheck sleeve engagement after adjusting index rodInstall the upper and lower housings of gearbox together using "Locti te Crankcase Sealant" or equivalentTorque nuts in the following sequence to 21 ftIbsWh en assembling gearboxalways position new "0" ring on index rod