Cars are equipped with 5- or 6-speed gearboxes. The gearbox housing is made of aluminum on the right and is bolted to the rear of the engine.
Torque is transmitted from the crankshaft through the clutch to the input shaft of the gearbox, the end of which is equipped with splines on which the clutch friction disc is put on. From the output shaft of the transmission box, power is transmitted through the cardan shaft to the main gear of the rear axle.
The input and output shafts of the gearbox are installed coaxially. The input and output shaft gears are in constant mesh with the countershaft gear assembly. Gear selection is made by moving the synchronizer hubs that connect the corresponding output shaft gears to the output shaft.
Gear shifting is carried out using a floor-mounted lever, and a gear selector mechanism (in some models, gear shifting is carried out using a switch mounted on the steering wheel). Some models may be equipped with "sports shifting". On these models, gear shifting is also carried out using a lever or button on the steering wheel. In addition, on these models, gear shifting can be carried out automatically using an electronic control unit. The control unit controls gear shifting and clutch (through hydraulic actuators) depending on road conditions and driving style.
Some models have a system "overclocking control". When the button is pressed, an electronic unit is activated that controls the engine speed, clutch and gear changes, achieving maximum vehicle acceleration. For more information on this system, contact your dealer or refer to your vehicle's owner's manual.
When acting on the shift lever, the corresponding gear selector shifter moves the synchronizer hub along the shaft until it engages with the gear of the gear being engaged. Since the synchronizer hubs are mounted on the splines of the output shaft, due to this, the gear is connected to the shaft, which ensures the transmission of torque. Synchronizers are available in all forward gears to ensure fast and smooth gear changes. Synchronizers include blocking rings, spring-loaded fingers, as well as gears and synchronizer hubs. Synchronizing cones are made on the ends of the gear and blocking rings.
During the manufacture of the car, oil is poured into the gearbox, which does not require replacement during the entire life of the car. At least the manufacturer does not give any recommendations on the frequency of oil changes.