The gearbox converts the engine torque, which is transmitted further through the small and large gears of the final drive. The large gear is fixed in the final drive housing. Drive shafts connect the main gear with the axle shafts of the wheels. The main gear together with the gearbox is mounted in one housing.
There are also four bevel gears connected to each other (differential), two of which are connected to the drive (cardan) shafts, which in turn transmit torque to the drive wheels of the car. Equal velocity joints mounted on shafts (type «tripod») provide transmission of the required torque at varying angles of inclination of the shafts.
During a straight-line movement on a perfectly flat surface, both wheels have the same rotational speed, equal to the rotational speed of the main gear. The differential rotates at a similar speed and the bevel gears are at rest. When cornering or hitting a bump, one wheel travels more distance than the other. In this case, the differential comes into play, which distributes the torque between the wheels and allows the driven shafts to rotate at unequal angular velocities.
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