Cutaway look at of a ZF 8HP transmission: torque converter on the left, planetary gearsets in the centre, Handle mechanisms at the bottom The most common structure of automatic transmissions could be the hydraulic automatic, which typically takes advantage of planetary gearsets that happen to be operated employing hydraulics. https://gearboxkeretaauto75429.elbloglibre.com/32331813/gearbox-kereta-auto-things-to-know-before-you-buy