What happens when a car's clutch disc is severely worn?

[DelMaria]

Severe wear of the clutch disc can cause phenomena such as clutch shaking, slipping, abnormal noises, and incomplete disengagement. Here is the relevant information: Clutch shaking: When starting the vehicle, even with careful gradual acceleration and slow release of the clutch pedal, the vehicle still fails to start smoothly and exhibits jerking. This occurs because the clutch engagement is shaky and unstable, leading to an unsteady start. Causes: Improper adjustment or deformation of the release levers, resulting in uneven contact between the three release levers and the release bearing. The damping springs of the clutch driven plate are too weak or broken, failing to provide adequate damping. Worn or insufficiently lubricated release bearing seats, causing inflexible movement.