2006 Honda TRX680 Rincon Factory Service Manual, Page 456Get this manual
FRONT DRIVING MECHANISM
DIFFERENTIAL REMOVAL
Drain the differential oil (page 4-16)Remove the following: left front mud guard (page 3-8) both inner fenders (page 3-9) front grille (page 3-10) left drive shaft (page 18-7) two bolts, guard plate and front Vehicle Speed Sensor (VS sensor)-
two bolts and VS sensor cover
Remove the rear VS sensor wire and front final clutch wire from the clampRemove the three bolts, VS sensor cover stay and rear VS sensorDisconnect the front final clutch 2P (Green) connector