Therefore, gearbox is important to control output speed & torque. According to the need of the automobile, we will reach distinctive speeds or torque with the help of the gearbox. A hydraulic automatic transmission uses planetary gearsets as opposed to the manual transmission's structure of gears lined up alongside input, https://gearbox-auto18517.blogspothub.com/33246715/the-fact-about-gearbox-auto-that-no-one-is-suggesting