1. Inspect the needle bearing for wear and damage.
2. Check the clearance between each shift fork and its corresponding synchronizer sleeve. The tolerance is 0.35-1.00 mm. If the clearance exceeds the tolerance, then the width of the groove on the sleeve should be measured. The width tolerance is 6.75-6.85 mm.
3. Inspect the gear teeth on all hubs and synchronizer couplings for wear on the edges, which indicates wear.
4. Insert each of the hubs into the appropriate coupling and check the play. If necessary, replace them together as one assembly.
5. Inspect the inner surface of the synchronizer ring, its teeth and the corresponding teeth on the gear for wear.
6. Inspect the thrust and taper surfaces of the gear hubs for wear.
7. Inspect all gear teeth for uneven wear, nicks, burrs, and cracks.
8. 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 0.40-1.18 mm. Remove the ring from the gear.
9. Inspect the oil passages for clogging. Inspect the output shaft splines for damage.
10. Measure the outside diameter of the bearing from the end opposite the thread. The tolerance is 32.95-33.02 mm.
11. Measure the diameter of the outer surface of the bearing located in front of the output shaft gear. The tolerance is 33.93-34.00 mm.
12. Measure the outside diameter of the bearing closest to the threaded end. The tolerance is
24.93-25.00 mm.
13. Check up 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.