Torque is transmitted from the gearbox to the rear wheels through the cardan shaft, which consists of two halves. Behind the center support of the driveshaft there is a sliding coupling. This connection compensates for small forward and backward movements of the cardan shaft. The front end of the propeller shaft is attached to the gearbox output shaft flange through a rubber coupling or cardan joint. On some models, a vibration damper is installed between the clutch and the front end of the driveshaft. The middle part of the cardan shaft is supported by an intermediate support, which is attached to the car body. At this point, as well as at the rear end of the cardan shaft, there are cardan joints to compensate for the movement of the transmission elements relative to the body and chassis of the car.
The final drive consists of a pinion, driven gear, differential and output flanges. The drive gear drives the driven gear. This wheel is sometimes referred to as the input shaft of the differential. The drive gear is attached to the cardan shaft with a flange connection. The differential is bolted to the main gear driven gear and rotates both output flanges, to which the drive shafts are attached, having hinges of equal angular velocities at the ends. The differential allows the rear wheels to rotate at different angular speeds when cornering.
The drive shafts transmit torque from the differential flanges to the drive wheels. Equal velocity joints are installed at each end of the drive shaft. The inner pivot is bolted to the output flange of the differential, while the outer pivot is splined to the wheel hub and secured with a large nut.
Complicated repair of final drive components (pinion, wheel and differential) requires a lot of special devices, as well as high adjustment accuracy, therefore it cannot be performed in a garage. If a complex repair of the final drive is necessary, we recommend that you contact a specialized service station.