The drive of each wheel consists of shafts and two hinges of equal angular speeds.
Hinges are fairly reliable components, but contamination can still lead to premature wear. Defective hinges make knocks when starting or reversing. You can also hear these knocks when moving the car with the engine not running. With severe wear, knocks develop into constant beating.
When knocking occurs, it is difficult to determine which of the four hinges is causing them. To do this, it is necessary to remove the rear wheel drive shafts and manually check how smoothly and clearly the hinges work.
After removing the drive shafts, it is possible to replace the rubber mudguards and the inner CV joint. It is not possible to replace the outer joint - in this case, the entire drive shaft must be replaced.