2004-2006 Honda FourTrax Rancher TRX350TE/TM/FE/FM Service Manual, Page 333Get this manual
REAR DRIVING MECHANISM Remove the il filler capRotate the ring gear several times in both directions of rotation Check the gear loath contact pattern through the oi fi ll er ho leThe pa tt ern is ind ica ted by the Prussia Blue app li ed to the pinion Con tact is norma if the Pruss ian Blue is transferred to the approximate center of each toothbut slightly to the heel side and to the flank sideIf the patterns are not correct, remove and change the pinion shim with one of an alternate th ickness
NORMAL: HEEL
DRIVE SIDE
COAST SIDE
Replace the pInion shim with thicker one if the contact pattern is too high, toward the faceReplace the pinion sh im with thinner one if the contact pattern is too low, toward the flankThe pattern will shift about 0.51.0 mm (0.02 0.04 in) when the thickness of the shim is changed by 012 mm (0.005 In)Pinion shims: A: 1.64 mm (0.064 Inl B: 1.70 mm (0.067 inl C; 1.76 mm (0.069 Inl1.82 mm (0.072 inl E: 1.88 (0.074 in )