Differential housing manufacturers tell you that the car differential can make the left and right (or front and rear) drive wheels rotate at different speeds. Differential housing manufacturers tell you that it is mainly composed of left and right side gears, two planetary gears, and a gear carrier.

Differential housing manufacturers tell you that the function of the differential is to make the left and right wheels roll at different speeds when the car is turning or driving on an uneven road, that is, to ensure that the driving wheels on both sides perform the pure rolling motion. The differential is installed to adjust the speed difference between the left and right wheels.
Differential housing manufacturers tell you that in four-wheel drive, in order to drive four wheels, all the wheels must be connected. If the four wheels are mechanically connected, the car cannot rotate at the same speed when driving in a curve. In order to make the rotation speed of the car curve run basically the same, it is necessary to add a middle differential to adjust the speed difference between the front and rear wheels.
The above information is the Differential housing manufacturer's introduction and analysis of the differential, hope it helps you.