Patent ID: 7730799

Claim:
A gear transmission mechanism for a motor vehicle consisting of only one countershaft, the mechanism comprising: a main shaft having at least one gear and defining a rotational axis ( 16 ); the countershaft having at least one gear, and the countershaft extending substantially parallel to the rotational axis of the main shaft; the at least one gear of the main shaft communicating with the at least one gear of the countershaft to provide at least one gear ratio, the rotational axis ( 16 ) of the main shaft (X axis) intersecting a drive axis (Y axis) to define a substantially horizontal plane (X-Y axis), and the countershaft ( 14 ) being located along a vertical axis (Z) above the substantially horizontal plane (X-Y axis), when viewed along the substantially horizontal plane (X-Y axis), and a hydraulic system of the gear transmission mechanism being located in a space vertically below the substantially horizontal plane (X-Y axis), wherein the main shaft is vertically located between the countershaft and the hydraulic system, the horizontal plane (X-Y) being normal to the vertical axis (Z).