1. Inspect needle bearings for wear and damage.
2. Inspect the inner surface of the synchronizer blocking rings for wear.
3. Insert each of the hubs into the appropriate coupling and check the play. If necessary, replace them together as one assembly.
4. Inspect the synchronizer ring teeth and corresponding teeth on the gear for wear on the edges.
5. Inspect the thrust and taper surfaces of the gear hubs for wear.
6. Inspect all gear teeth for uneven wear, nicks, burrs, and cracks.
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 0.40-1.18 mm. Remove the ring from the gear.
8. Inspect the splines and gear teeth on the input shaft for damage or excessive wear.
9. Inspect oil passages for blockage.
10. Measure the outer diameter of the contact surface of the ball bearing in front of the 4th gear. The tolerance is 27.95-28.12 mm.
11. Measure the outside diameter of the 3rd gear needle bearing contact surface. The tolerance is 31.93-32.00 mm.
12. Measure the outer diameter of the contact surface of the needle bearing in front of the 5th gear synchronizer hub. The tolerance is 24.93-25.0 mm.