Differential housing manufacturers tell you that if the drive wheels on both sides of the drive axle are rigidly connected by a whole shaft, the two wheels can only rotate at the same angle. Differential housing manufacturers tell you that in this way, when the car turns to drive since the outer wheel moves a greater distance than the inner wheel, the outer wheel will slide while rolling, and the inner wheel will slide while rolling.

Differential housing manufacturers tell you that even if the car is driving in a straight line, the rolling radius of the tires will vary due to uneven road surface or although the road surface is straight (tire manufacturing error, different wear, uneven load, or different air pressure) causing wheel slip.
Wheel slip not only increases tire wear, increases power, and fuel consumption, but also makes steering difficult and braking performance worse. In order to prevent the wheels from slipping as much as possible, the structure must ensure that the wheels can rotate at different angles.
Between axles: Differential housing manufacturers tell you that the driven wheels are usually supported on the main shaft with bearings so that they can rotate at any angle, while the driving wheels are rigidly connected to the two half-shafts respectively, and a differential is installed between the two half-shafts. speeder. This differential is also known as an inter-axle differential.
Differential housing manufacturers tell you that for multi-axle-driven off-road vehicles, in order to enable each drive axle to rotate at different angular speeds to eliminate the slippage of the drive wheels on each axle, some are equipped with an inter-axle differential between the two drive axles.
The above information is the Differential housing manufacturer's introduction and analysis of the working principle of the differential, hope it helps you.