What Causes Severe Shaking After Car Starts?

[Leila]

If the clutch components frequently fail to engage smoothly when the vehicle starts, it can cause the car body to shake during startup. It is recommended to check whether the clutch pressure plate, pressure springs, and release levers are on the same plane. The specific reasons for startup shaking are as follows: 1. Clutch Shaking: Let the engine idle, engage a low gear, slowly release the clutch pedal, and increase the throttle to start. If the car body shakes at this time, it indicates clutch shaking. 2. Uneven Pressure Distribution Between the Driving and Driven Plates: In a frequently engaged clutch, uneven elasticity of the pressure springs, inconsistent adjustment of the release levers, and/or uneven separation fingers of the diaphragm spring can lead to asynchronous pressure application, uneven force on the pressure plate, or even tilting of the pressure plate, causing poor contact between the driving and driven plates and resulting in clutch shaking. In this case, the clutch pressure springs should be replaced, and the release levers should be leveled. 3. Weakened Damping Spring Elasticity: Weakened elasticity of the clutch torsion damping springs, weakened elasticity of the clutch pressure springs, or cracks in the diaphragm spring can all cause shaking when the clutch engages. The solution here is to replace the springs. 4. Poor Contact of Clutch Lining: Poor contact of the clutch lining, surface hardening, or adhesion of sticky substances can easily cause clutch shaking. In this case, the clutch lining should be re-bonded or the driven plate should be re-bonded.