With this clutch failure, the vehicle jerks off. The transmission of torque to the drive wheels is not smooth enough. The reasons may be the following:
1. The engine or gearbox mount is defective or loose, and these units oscillate when the clutch is engaged.
2. The lining of the driven disk has traces of overheating and hardening, which, as a rule, is the result of increased loads.
3. The pressure plate is deformed or there are slight irregularities on its adjacent surface.
4. Irregularities on the working surface of the flywheel.