A transmission system comprises two transmission modules 1 and 2 which are arranged in series, an output shaft IB of the first transmission module 1 being connected via a mount point 5 to an input shaft 2 A of the second transmission module 2. The transmission system further includes an electromotor 7 which is connected to the mount point. The first transmission module 1 is formed by a two-step reduction mechanism and comprises a planetary gear set 9 with at least three rotational members one of which is connected to a brake 11. The first transmission module 1 further includes a short-circuit clutch 13 which is positioned between the other two rotational members. The brake may be used for launching the vehicle. The second transmission module 2 is formed by a continuously variable transmission. The short-circuit clutch 13 may be used to form a regime switch so that the range of the continuously variable transmission can be gone through twice.
