2006 Honda TRX680 Rincon Factory Service Manual, Page 502Get this manual
REAR DRIVING MECHANISM FINAL GEAR CASE ASSEMBLY NOTE: When the gear set, bearing, andor gear case has been replaced, check the tooth contact pattern check (page 19-18)Check the gear backlash (page 19-16)Keep dust and dirt Clean the mating surface of the gear case and cover, out of the case and being careful not to damage themcovergcompressed air through the breather holes in the gear case and cover
Install the proper ring gear shims onto the ring gear and install them into the gear case
Coat new O-ring with grease and install it into the cover grooveInstall the case cover onto the gear case
Apply locking agent to the threads of the two 10mm boltsIt is important to turn the pinion while tightening the boltsIf the ring gear shim is too thick, the gears will lock after only light tightening