2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 291Get this manual
Differential: 5) Remove the dial gauge and turn the front drive (differential) gear 120then measure the backlashRepeat this procedure once more and compare the difference of the three measurementsThe backlash should be re-checked until the backlash is within specificationCheck the table at the appropriate shim thicknessIf the backlash is too small, replace the right side shim(-s) with thicker oneIf the backlash is too large, replace the right side shim(-s) with thinner oneIf the right side shim was changed with 0.10 mm thicker shim, replace the left side shim with one that is 0.10 mm thinnerNOTE Adjust the backlash by referring to the table and using the thickness of the removed shims as guideBacklash Under 0.05 mm (0.0020 in) 0.05 0.10 mm (0.0020 0.0040 in) Over 0.10 mm (0.0040 in) Shim adjustment Increase shim thickness Correct Decrease shim thickness
Left Side Shim Selection 1) Disassemble the front drive (differential) assemblyRefer to "Front Drive (Differential) Assembly Disassembly and Assembly (LT-A400F, LT-F400F) (Page 3B-5)"2) Install the right side shim(-s) and front drive (differential) gear assemblyNOTE Do not install the left side shim(-s) at this time