Main shaft: It is usually called an output shaft. It provides mandatory torque to your car. It's ridges and tooth And so the gears can move easily. The engine is connected to the transmission because of the torque converter, which transfers ability into the gears by means of pressurized fluid. https://gearbox-auto24455.blogtov.com/14286215/not-known-factual-statements-about-gearbox-auto