2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 240Get this manual
FRONT CONSTANT VELOCITY JOINTS AND DIFFERENTIAL GEAR
3.Check: Differential gear operation Unsmooth operation Replace the differential gear assemblyInsert the double off-set joint into the differential gear, and turn the gear back and forth
MEASURING AND ADJUSTING THE DIFFERENTIAL GEAR LASH Measuring the differential gear lash 1.Secure the gear case in vise or another supporting device2.Remove: Drain plug Gasket 3.Install: bolt of the specified size (into the drain plug hole)