What happens when speed and gear do not match?

[IsabelFitz]

When the gear does not match the speed, the car may be fine in the short term, but prolonged mismatching can accelerate wear and tear on mechanical components and lead to premature damage to the engine and transmission. The main issues include increased gear backlash in the transmission, which accelerates wear, and potential damage to the damping springs of the clutch plate. Below are the consequences of speed and gear mismatch during driving tests: 1. If you shift directly into 2nd gear without going through neutral, the computer will still assume you are in 1st gear. Driving at 2nd gear speed under this condition will cause the computer to detect a speed mismatch for 1st gear, which naturally leads to a perceived RPM mismatch. 2. If the clutch pedal is not fully depressed during gear shifting and a higher gear is engaged, the sensors will not receive the shift signal. As the speed increases, the system will still assume you are in the lower gear, resulting in a failed test for the same reason as above.