Principal shaft: It's also referred to as an output shaft. It offers required torque for the vehicle. It's got ridges and teeth Therefore the gears can go effortlessly. On automobiles without paddle shifters it is possible to continue to alter gears manually by tapping the gear lever backwards and forwards, https://gearbox-auto20741.dailyblogzz.com/34349890/the-5-second-trick-for-gearbox-auto