1. Inspect needle bearings for wear and damage.
2. Inspect the inner surface of the synchronizer blocking rings for wear.
3. Insert the hub into the appropriate coupling and check the play. If replacement is required, they should be replaced together as one unit.
4. Inspect the synchronizer ring teeth and mating teeth on the gears for wear and wear.
5. Inspect the thrust and taper surfaces of the gear hub for wear.
6. Inspect all gear teeth for uneven wear, scoring, burrs, and cracking.
7. Install the synchronizer ring in the cone of the corresponding gear and rotate it until it stops. The gap between the ring and the gear has a tolerance of 0.40-1.10 mm. Remove the ring from the gear.
8. Inspect the oil passages in the output shaft for clogging.
9. Measure the outer diameter of the contact surface of the needle bearing. The tolerance is 32.95-33.02 mm.
10. Measure the outside diameter of the contact surface of the low gear behind the splines. The tolerance is 39.93-40.00 mm.
11. Measure the outside diameter of the ball bearing surface near the threaded end of the shaft. The tolerance is 24.94-25.00 mm.
12. Measure wear of a secondary shaft. The maximum allowable wear is 0.05 mm. If any of the tolerances are not met, then the output shaft should be replaced.