Abstract: On a shaft between two drove wheels (6, 7), a motor vehicle has a differential gear, which has a differential lock that can be used to lock the two drive wheels relative to each other. To reduce the stress that the differential lock can be subjected to, there is a device (10) that, when the differential lock is engaged, senses the relative angle of rotation between the drive wheels and when this reaches a predetermined marginal value, one of the wheels is braked with the help of a control unit (11) in order to limit the relative rotation between the wheels. The outer wheel is braked when moving in a curve.