Transmission assembly for a motor vehicle

Transmission assembly (1) for a motor vehicle with a gearbox (53) comprising a clutch (9), a clutch release device (3), a reversible rotary electrical machine (4) provided with a rotor (5) with a central opening, an intermediate shaft (6) between the clutch and the rotor (5) of the electrical machine (4), said intermediate shaft (6) bearing the release device (3) at the front, and penetrating in the central opening in the rotor (5), wherein it comprises a dry friction clutch (9) provided with a reaction plate, and in that it comprises, at the front, a double damping flywheel (7) which is configured to be secured on a crankshaft of a thermal engine (52) of the vehicle, and to form the reaction plate of the dry friction clutch (9), and at the rear, it comprises a torsion damper (8) which is configured to be connected in rotation to an input shaft (54) of the gearbox (53), and in that the rotor (5) of the electrical machine (4) is secured on the torsion damper (8).