Alternatively, they use a torque converter program, relying on gearbox oil to transfer energy from the input shaft into the gears. Computers in the vehicle identify just when gears have to be modified. Manual transmissions may have a gear persist with shift gears, with the help of the clutch pedal. https://automobilegearbox07383.bloguerosa.com/33123411/not-known-facts-about-automobile-gearbox