Cutaway view of a ZF 8HP transmission: torque converter to the still left, planetary gearsets while in the centre, Command mechanisms at The underside The most common style and design of automatic transmissions is the hydraulic automatic, which typically works by using planetary gearsets which can be operated employing hydraulics. https://mylesdmpqn.blogolize.com/not-known-factual-statements-about-gearbox-auto-72791934