Noise, vibration and harshness (NVH) troubleshooting
NVH troubleshooting Chart
Locate the area where noise occurs.
Confirm the type of noise.
Specify the operating condition of engine.
Check specified noise source
If necessary, repair or replace these parts.
Location
of noise
Type of
noise
Operating condition of
...
Mainshaft and gear
Exploded View
1. Mainshaft front bearing 2. Mainshaft 3. 1st main gear
4. 1st inner baulk ring 5. 1st synchronizer cone 6. 1st outer baulk ring
7. 1st-2nd synchronizer hub 8. 1st-2nd coupling sleeve 9. Spring
10. Insert key 11. 2nd outer baulk ring 12. 2nd synchronizer cone
13. 2nd inner b ...