Why does the clutch make a clunking sound when shifting from first to second gear?

[DeAndres]

When shifting from first to second gear in a car, there is a jerking sensation when releasing the clutch. This happens because the clutch is released too quickly. The gear ratio differences between each gear in low-speed gears are relatively large, while in high-speed gears the differences are smaller and less noticeable. The reasons for the clunking sound when shifting from first to second gear while pressing the clutch are as follows: Releasing the throttle too early: Lifting the throttle before pressing the clutch when shifting. The engine jerks. When shifting in low gears (especially from first to second), the throttle and clutch must be well-coordinated to ensure smooth driving. Releasing the throttle too late: If the clutch is pressed but the throttle is not lifted in time during shifting, the car will accelerate momentarily during the semi-clutch phase, and there will be a jerking sensation when the power is completely disconnected after full separation.