A transmission assembly includes a common ring gear assembly, a first sun gear, a first planet carrier, a second sun gear and a second planet carrier. A set of planet gears of each one of the first and second planet carriers meshing with the common ring gear assembly. The set of planet gears of the first planet carrier meshing with the first sun gear and the set of planet gears of the second planet carrier meshing with the second sun gear. The transmission assembly further includes a transmission housing.
The second sun gear is adapted to be connected to a transmission input shaft;
the common ring gear assembly is adapted to be connected to a transmission output shaft, and
the second planet carrier and the first sun gear are operatively connected to each other.