What Causes Severe Shaking When Starting a Manual Transmission Car?
1 Answers
Severe shaking when starting a manual transmission car is usually caused by wear and slippage of the clutch pressure plate and disc, often due to aging or quality issues. This requires simultaneous replacement of both the pressure plate and disc. For novice drivers, driving school vehicles typically have higher idle speeds, allowing smooth starts without throttle input. However, almost all manual transmission cars on the market require gradual throttle application during starts. Details are as follows: 1. Troubleshooting: Car start-up shaking is a very common phenomenon with multiple potential causes, either due to vehicle malfunctions or poor driving habits. Identifying the root cause is essential for timely repairs. 2. Causes of Shaking: When experiencing start-up shaking, carefully investigate the specific reason as different shaking patterns indicate different issues. Recommended procedure: let the engine idle, engage low gear, slowly release the clutch pedal while gradually applying throttle. If significant body vibration occurs, this indicates clutch shuddering. Other possible causes include broken or loose driven plate rivets, fractured driven plate steel sheets, or unbalanced rotating components. Additionally, loose engine mounts or misalignment between the transmission's primary shaft and the engine crankshaft centerline can also cause start-up shaking.
