Method for controlling the oil level in a gearbox, and gearbox for carrying out said method

The invention relates to a method for controlling the oil level (h3) in a differential gearbox for a vehicle having an oil sump (3) and an oil reservoir (4) that is pneumatically separated from the oil sump (3). The oil reservoir (4) is connected to the oil sump (3) by way of at least one oil channel (34), and the oil sump (3) is connected to a pneumatic pressure source (8) by way of at least one control valve (7) and an air line (5), wherein in at least one position (B) of the of a the control valve (7), the pressure source (8) is pneumatically connected to the oil sump (3). In order to improve the efficiency, at least one first characteristic operating parameter of the vehicle, according to the invention, is detected, and the control valve (7) is operated in dependence of at least said first characteristic operating parameter, wherein the vehicle speed (v) is selected as first characteristic operating parameter.