Cutaway perspective of the ZF 8HP transmission: torque converter about the still left, planetary gearsets inside the centre, Manage mechanisms at The underside The most typical style of automatic transmissions is the hydraulic automatic, which usually makes use of planetary gearsets which are operated applying hydraulics. 1 (also labelled "L"): https://spencerckopp.myparisblog.com/34288563/a-review-of-gearbox-auto