The gearbox is linked to the engine’s crankshaft through a clutch, which allows the motor and gearbox to be temporarily disengaged when changing gears. Its Most important purpose would be to churn out the appropriate number of power and torque into the wheels at different speeds to achieve optimum functionality https://automobile-gearbox63061.blogdal.com/34600948/not-known-details-about-automobile-gearbox