1995-2003 Honda Foreman TRX400FW TRX400 TRX 400 400FW Service Manual, Page 298Get this manual
REAR DRIVING MECHANISM
TROUBLESHOOTING
REAR FINAL DRIVE
hcessive noise WeHn Or SCOfed ring )ear shaft and driven flange Scored driven flange and wheel hub Worn or SCOfed drive pinion and splines Worn pin ion and ring )ears hoeosslve backlash between pinion and ring {lear Oillavel too low