Gear Synchronizer Blocking Ring Inspection

1. Inspect synchronizer blocker ring fiction surfaces (1) for wear or damage.
2. Inspect synchronizer blocker ring teeth (2) for excessive wear.
3. Inspect the synchronizer blocker ring lugs (3) for excessive wear.
4. Inspect the synchronizer springs (4) for wear.





5. Inspect gear thrust surface (2) for wear or scoring.
6. Inspect gear cone surface (2) for wear.
7. Inspect the clutching teeth (3) for excessive wear, chipping, or cracks.
8. Inspect gear teeth (4) for uneven wear scoring, galling or cracks.





9. Install synchronizer blocker ring to matching gear.
10. Measure clearance between blocker ring and gear in four places.
The minimum blocker ring to gear clearance for synchronizers:
1st Gear: 0.8 mm (0.030 inch)
2nd Gear: 0.8 mm (0.030 inch)
3rd Gear: 0.5 mm (0.020 inch)
4th Gear: 0.5 mm (0.020 inch)
5th Gear 0.5 mm (0.020 inch)
Reverse Gear: 0.5 mm (0.020 inch)