A transmission unit (7) with a housing (9), a transmission input shaft (10) and three transmission output shafts (11, 12, 13), at least two planetary gearsets (14, 15) and a device (16) arranged between two actively interconnected shafts (14A, 15A) of the planetary gearsets for variable distribution of torque delivered by the transmission input shaft between two of the three transmission output shafts is described. A web (14D) of the first planetary gearset is formed with a differential cage (19A) of a differential (19), which is provided in order to distribute part of the torque which is delivered by the transmission shaft that has been passed on to the two of the transmission output shafts between the two transmission output shafts.