2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 94Get this manual
MAINTENANCE
REAR FINAL GEAR CASE OIL AND DIFFERENTIAL OIL
FINAL GEAR CASE OIL
lEVEL CHECK
Place the ehicl level su rfaceRemove he il filler cap
Check tha the il level is 10 the lower ed ge of the oil
fill er hole
Check for leaks if the oil level is lo wPou the oi th rough he fill er hol nt il it reaches he lower edge of he ho le
RECOM MENDED OIL: Hypoid gear oi SAE #80
Coat new O-ring with rease and install it into th e