Basic Design

The gearbox is designed for front wheel drive and forms a unit with the engine. The drive unit is transversely mounted in the car, which gives good cooling and the shortest possible route for the transfer of power to the drive wheels.




The manual gearbox is a five-speed gearbox. All gears (including reverse) are synchronized. The gearbox has relatively small rotating masses, and thus small moments of inertia to be braked at each gear change. This makes gear changing easy and smooth and interior wear on baulk rings and sleeves almost non-existent. The baulk rings are placed on the input and output shafts.

Note that the gear wheels on the input shaft are called pinions (are driving), while the gear wheels on the output shaft are called gear wheels (are driven). The pinions on 3rd, 4th and 5th gears are installed in needle bearings in order to achieve the lowest possible losses from friction and thus a high degree of efficiency.

Input and output shafts are installed in conical roller bearings to give the shafts maximum bending rigidity when under load. The output shaft's roller bearings are placed inside the final gear drive, which gives the shaft maximum insensitivity to high loads.




The gearbox has only two parting lines. The parting surface between clutch case and gear case is sealed with sealant and the parting surface between gear case and end cover is sealed with a gasket. Ventilation and de-airing are carried out through a "labyrinth" in the upper part of the gear case, in which there is also a filter (sintered plug) to keep out dirt and moisture.