General information about front-wheel drive transmission (VAZ-2109)

The most significant difference between front-wheel drive vehicles is the layout of the power unit (engine with transmission units). It is located in the engine compartment across the vehicle, and torque is transmitted to the front drive wheels directly from the differential via constant velocity joints, eliminating the need for a cardan transmission and rear drive axle mechanisms (like classic layout cars). With this arrangement, the connection between the power unit and the drive wheels is carried out in the most rational and compact way.

The transmission of torque from the engine to the drive wheels of the car is carried out through the transmission, which includes the clutch, gearbox and front wheel drive. The gearbox is structurally combined (in one crankcase) with the main gear and differential and is attached via the clutch housing to the rear end of the engine block. Depending on the vehicle's configuration, a four- or five-speed gearbox with different main gear ratios can be installed.

(The original is available on the online resource VAZBOOK)