A transmission device for an automotive vehicle, which device includes a first spur gear transmission section, a second spur gear transmission section and a plurality of double planet pins. The double planet pins extend from a first side section to a second side section. Each of the double planet pins carries one first planet of the first set of planets and one second planet of the second set of planets. A plurality of supporting pins are also provided, each of the supporting pins carrying one third planet of the third set of planets. The supporting pins extend from the first side section to the second side section.