Why Does a Manual Transmission Car Shake Violently When Starting?

1 Answers
LaWalter
07/30/25 4:06am
Manual transmission cars shake violently when starting for the following reasons: 1. Insufficient engine power: This is caused by loose connections between the transmission and the chassis, or uneven engagement between the clutch pressure plate and the clutch friction disc. If not addressed promptly, it may lead to increased carbon buildup in the engine, damage to the spark plugs, and accelerated aging of engine components. 2. Engine under prolonged abnormal load: Manual transmissions primarily transmit power through the clutch, with the clutch pressure plate being the main component responsible for kinetic energy transfer. Prolonged semi-engagement or the engine operating under abnormal load conditions can accelerate wear on the clutch pressure plate, reducing its service life. When the pressure plate wears to a certain extent, power engagement becomes less smooth, causing the car to shake and the engine speed to remain unstable.
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