Abstract: A differential gear includes a rotatable housing, a first output shaft connected to a first gear element and a second output shaft connected to a second gear element of a differential planet gear train disposed within the housing and having further gear elements attached to the housing. A planet gear train is disposed within the housing and has a ring gear attached to the housing, a planet wheel connected to the ring gear and a sun wheel connected to the planet wheel. The sun wheel is connected to a hollow shaft having the second output shaft disposed therein. A fluid pump having a first member rotatable with the hollow shaft and a second member rotatable relative to the first member is disposed between the housing and the hollow shaft for braking relative rotation between the housing and the hollow shaft in response to a difference in rotational speed between the first and the second output shaft.