2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 199Get this manual
ENGINE REMOVALINSTALLATION Coat new ring with molybdenum disulfide grease and install it in the output shaft grooveApply molybdenum disu lfide grease to the propeller shaft joint splinesEngage the propelle shaft joint ov er the outpu shaft, aligning he jo int and shaft splines while moving the differential rearward
Upper Side"
A lign the ou nti ng points of the di fferen ial and rame, and ins tallthe spacer (between he left side of th differential and frame) and 10-m bolt from the ri ht side Install new 10-mm nutInstall the 10-m bo lt from the rig ht side