Differential gear unit for motor vehicles having controllable driving power distribution

A differential gear unit for motor vehicles for the controllable distribution of the driving power comprises a housing and a differential gear disposed therein, the gear having two speed-changing transmissions drivingly connected to the output shafts and to the input member of the differential gear, and two hydraulically controllable clutches. In order to avoid the transmission of rotations and to be easy to mount and access, an intermediate part is disposed stationary on the housing between the two clutches, the part comprising the hydraulic actuation device, the pressure rings of the clutches are disposed on the side facing the intermediate part, the outer part of the first clutch is drivingly connected to the speed-changing transmission and to the inner part of the second clutch via an intermediate shaft, and the inner part of the first clutch is drivingly connected to the first output shaft, and the outer part of the second clutch is connected to the second output shaft.