The gearbox converts the torque transmitted from the engine in magnitude and direction. This is necessary to ensure optimal speed and patency of the car, for the most economical operation of the engine, as well as for reversing the car. In addition, the gearbox separates the engine and transmission when the vehicle is stopped and parked, and when it coasts with the engine running.
The gearbox parts are housed in the crankcase, which is bolted to the rear of the engine.
The torque from the engine through the clutch is transmitted to the input shaft of the gearbox. The output shaft of the gearbox transmits torque through the differential to the drive shafts. The gear is switched on by moving the synchronizer sliding clutch, as a result of which the gear of the corresponding gear is rigidly connected to the gearbox shaft.
Some of the cars have an automatic transmission.
Since the gearbox, especially automatic, is a complex unit, its repair must be carried out in a specialized workshop using special equipment.
This section contains operations related to the diagnosis, maintenance, adjustment of the gearbox, as well as its removal and installation.