ZF S5-31 transmission


The ZF S5-31 transmission is a five-speed manual transmission by ZF Friedrichshafen. The transmission is designed for use in longitudinal engine applications. The transmission is rated for 310 Nm of torque. The transmission weighs ~39 kg, and holds 1.3 litres of transmission fluid.
Using different bell housings, the transmission was fitted to many different BMW engines.

Designation by BMW

The ZF S5-31 transmission is referred to as "S5D 310Z" by BMW. The transmissions made from September 1995, were made with a reinforced design and are named "S5D 320Z", and is rated for 320 Nm.
breakdown of the old BMW transmission designation

Applications