The Renk HSWL 354 is a hydromechanical power shift, reversing and steering transmission with four forward and two reverse gears and is installed in the Krauss-Maffei Leopard 2, Leopard 2 driver training vehicle and MaK Armoured Recovery Vehicle 3.

Operation is fully and semi-automatic and the transmission can be mounted to the engine directly or via a connecting component. Mechanical brakes are built on to the output shafts which are transverse to the input.

Propulsion drive is via a torque converter with lock up clutch, shifting and reversing gear to be shifted under load with planetary gear sets, multidisc brakes and clutches.

Steering drive is infinitely variable by a hydrostatic-hydrodynamic superimposed steering system.

The transmission brake is a combined hydrodynamic-mechanical brake system as service brake, without parking and auxiliary brakes.

The central oil supply consists of a built-in reservoir, pumps, filters and valves. A connection for the oil heat exchanger is provided.

Controls consist of an electric remote control for gearshifting and reversing; mechanical actuation of steering, service brake and emergency drive second gear forward and reverse when the current fails. Power take-off is from the two cooling fans.

Options for the Renk HSWL 354 transmission include connecting cable between gear selector, electronic control unit, transmission and vehicle, output gear-type couplings, final drives, sprocket drums and external testing device.

Production. By mid-1999 well over 3,000 of these transmissions had been completed. The Leopard 2 MBT is used by Austria, Denmark, Germany, Netherlands, Spain, Sweden and Switzerland.