| Malfunction | Cause | Solution |
| Presence of extraneous noise (when starting off) | Oil leak | Topping up |
| Low viscosity oil | Replacement | |
| Oil clogging | Replacement | |
| Increased clearance of the main gear pair | Adjustment | |
| Wear or damage to the teeth of the main gear | Replacement | |
| Wear or damage to the drive gear teeth | Replacement | |
| Wear of the differential axle gear bearing or shaft | Replacement | |
| Deformation of the bridge casing | Replacement | |
| Deformation of the main gear housing | Replacement | |
| Wear of the main gear shaft | Replacement | |
| Incorrect preload of the final drive gear | Adjustment | |
| Incorrect contact of the main gear pair | Disassembly and assembly | |
| Transmission oil leak | High oil level | Adjustment |
| Wear of the seal or surface of the differential cup | Repair | |
| Crack in the main gear housing | Replacement | |
| Worn or damaged oil seal | Replacement | |
| Presence of extraneous noise (when turning) | Wear or damage to the teeth of the axle or drive gear | Replacement |
| Wear of the drive pinion shaft | Replacement | |
| Excessive clearance between the drive and axle gear | Replacement | |
| Excessive axial play of the drive shaft | Adjustment | |
| Incorrect engagement of axle gears with differential housing | Replacement | |
| Crack in the main gear housing | Replacement | |
| Deformation or improper installation of the drive gear seal | Replacement | |
| Damage or rupture of the gear seal | Replacement | |
| Loosening of the bearing ring | Replacement | |
| Worn or damaged universal joint | Replacement | |
| Worn or damaged drive shaft bearing | Replacement | |
| Overheat | Lack of lubrication | Topping up |
| Insufficient gear clearance | Adjustment | |
| Excessive bearing preload | Adjustment |
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