What is the reason for the noise of the rear drive differential?

The differential will produce some noise. If the noise is too large or there is abnormal sound, it is generally because the gap between the teeth of the basin angle is too large and the adjustment gap is too tight, and the oil viscosity is not up to standard.

The automobile differential can make the left and right (or front and rear) driving wheels rotate at different speeds. It is mainly composed of left and right shaft gears, two planetary gears and a rack. The function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, that is, to ensure that the two sides drive the wheels to do pure rolling motion.