What causes the jerking sensation when shifting gears during Subject 3 driving test?
1 Answers
When shifting gears and releasing the clutch, if the engine speed does not match the current vehicle speed (meaning there's a speed difference between the engine RPM and clutch disc RPM - in most cases the engine RPM is lower than the clutch disc RPM), a jerking sensation will occur. Impact on the vehicle: The speed difference between engine and clutch disc leads to imperfect engagement between clutch and engine. The force interaction between clutch and engine accelerates clutch wear. The gear-shifting impact also damages transmission gears. The sudden engine-driven transmission rotation increases fuel consumption. Therefore, prolonged occurrence will inevitably affect vehicle performance over time.