The hydrodynamically cooled clutch (HCC®) is a wet-running start-up clutch with a unique, autonomously generated internal oil circulation - the "HCC effect". This clutch is designated for use in conventional stepped automatic transmission or CVTs. The use of identical interfaces along with hardware - analogous to the torque converter - enables a "Plug and Play" application. Only the transmission's software must be adjusted to the gain in strategy capability. Due to the significantly improved cooling, the HCC® can be utilized in vehicles with high thermal demand.