Minor corrosion, nicks, or pitting can be smoothed with 400 grit emery and polished out with crocus cloth. Bearings: Inspect for worn, cracked, flat-spotted or brinnelled.Gears: Inspect for worn, chipped or cracked teeth. Inspect bearing surfaces for ware or flat-spotted.Mainshaft: Inspect for worn splines, snap ring grooves and threads. Inspect bearing surfaces for ware or flat-spotted.Third gear (1) and fourth gear (2) are serviced with mainshaft only.

Countershaft: Inspect for worn, chipped or cracked teeth. Inspect bearing surfaces (1) for wear or flat-spots. Inspect 3-4 synchronizer assembly (2).The countershaft is serviced as an assembly.

Input Shaft: Inspect for worn, chipped or cracked teeth (1). Inspect bearing surface (2) for wear or flat-spots. Inspect for worn splines (3).

Synchronizer components: Inspect for worn, chipped or cracked teeth (1) and burned friction surface (2) or flaking off friction material (3). Synchronizers are serviced as an assembly. 3-4 synchronizer assembly is serviced with countershaft.

Shift forks: Inspect shift forks and shoes (1) for wear and distortion. Check fit of fork shoes in synchronizer sleeve to ensure parts fit and work smoothly, replace if necessary. If shift fork pads (2) are worn, the shift fork must be replaced.Housing/Tail housing: Inspect sealing and mating surfaces are free of burrs and nicks. Inspect alignment dowels are tight and in good condition.

Input Shaft Retainer: Inspect retainer (1) release bearing slide surface (2).