What is the reason for not feeling the car shake during semi-engagement of the test vehicle?

[TheoMarie]

The reason for not feeling the car shake during semi-engagement of the test vehicle is the uneven distribution of positive pressure between the driving and driven discs. Here are the relevant explanations: 1. Clutch: When the test vehicle does not shake during semi-engagement, it causes the clutch to remain in a semi-friction state during separation. Over time, the clutch steel plate will deform. A broken clutch damping spring can also cause shaking. Many clutches often have poor sealing and heat dissipation, making them more prone to high temperatures during prolonged friction. Under high temperatures, the flywheel and pressure plate are more likely to deform. 2. Precautions: If the clutch shakes slightly during semi-engagement, it can be ignored. If the shaking is very severe, even on flat roads, it is recommended to replace the clutch disc, pressure plate, or flywheel, but this should be determined after disassembly and inspection.