a differential it could likewise be a distributor transmission or a step down transmission for driving a machine for example in the foodstuff industry the hypoid drive 2 and the differential 3 are located in the housing 1 the hypoid drive 2 is composed of a drive pinion 4 seated on a shaft 6 and a crown wheel 5 the shaft 6 is guided in bearings 7 the exterior of which is adjoined by a sealing ring 8 the differential 3 is also of the customary design and is therefore not shown in a cutaway view a half shaft 9 which leads to a wheel is shown at the bottom in the interior of the housing there is an oil sump 10 whose liquid level in the stationary state is denoted by 11 the crown wheel dips into the oil sump 10 furthermore a filling opening and vent 13 and an outlet 14 for the lubricant and coolant as well as a temperature sensor only installed for trials are indicated however instead of being filled with transmission oil said transmission is filled with a lubricant and coolant which is composed essentially of an aliphatic hydrocarbon with at least two hydroxyl groups or.