Cutaway look at of a ZF 8HP transmission: torque converter on the remaining, planetary gearsets inside the centre, Manage mechanisms at The underside The most common style and design of automatic transmissions will be the hydraulic automatic, which typically employs planetary gearsets which can be operated working with hydraulics. From https://jaspernuyac.fireblogz.com/65004796/gearbox-auto-an-overview