Sign | Probable Cause | Remedy |
| Vibration, noise | Damage to the gearbox mounting and the lower frame | Tighten |
| Increased axial play of the shaft | Adjust the clearance |
| Worn or damaged gear | Replace |
| Using non-recommended oil | Fill recommended gear oil |
| Oil low level | Add oil |
| Inadequate speed idling | Adjust speed to idle |
| Oil leaks | Damaged O-rings | Replace O-rings |
| Difficult moving the shift lever | Faulty control cable | Replace control cable |
| Violation of contact or wear tapered surface synchronizer and gear | Replace |
| Loose Spring synchronizer | Replace synchronizer spring |
| Using non-recommended oil | Fill recommended gear oil |
| Spontaneous shutdown transmission | Worn shift fork or a broken diaphragm spring | Replace the plug or spring |
| Excessive clearance of the sleeve of the synchronizer | Replace synchronizer hub |
| Worn or damaged gears and / or bearings | Change gears and / or bearings |
