Torque converters have for decades been used as a priority in automatic transmission and stepless CVT gearboxes. The converter is arranged between engine and gearbox and transfers torque to the transmission intake shaft. Torque transfer occurs during start-up hydrodynamically and serves to reduce consumption during driving via an integrated friction clutch. Additionally, during start-up, the converter increases torque to the gear intake shaft by up to a factor of 3. LuK high-performance torque converters are developed and manufactured in Germany and in the USA. LuK optimises converter characteristics in dependence of the performance data required and the packaging space available, thereby supplying optimal components for the vehicle.