Why Does the Car Jerk When Downshifting?

[LeAmara]

The reason a car jerks when downshifting is due to a mismatch between the engine speed and the current vehicle speed, meaning there is a difference in rotational speed between the engine and the clutch disc (in most cases, the engine speed is lower than the clutch disc speed). The engine serves as both a power generation device and can refer to the entire machine, including the power unit (such as gasoline engines, aircraft engines). Engine types include internal combustion engines (e.g., gasoline engines), external combustion engines (e.g., Stirling engines, steam engines), gas turbines (used in racing cars), and electric motors. The clutch is located within the flywheel housing between the engine and the transmission, secured to the rear plane of the flywheel with screws. The output shaft of the clutch is the input shaft of the transmission.