Intense vibration
- The friction disc linings are contaminated with grease
- Loose or worn engine/gearbox mounting brackets
- The gearbox input shaft or the friction disc hub grooves are worn out
- The friction disc linings are worn out
Clutch slippage
- The friction disc linings are contaminated with grease
- Clutch pedal or spring is seized
Clutch grabbing (does not disengage)
- Air in the hydraulic system
- The friction disc is seized in the grooves of the input shaft
- The bushing bearing is seized
Noise when pressing the clutch pedal
- Dry or worn release bearing
- The diaphragm spring is worn out
[The full version is posted on the resource: audimanual.ru]