If the shafts are rigidly connected, that is, if multiple shafts are running at the same speed at all times, then the car will have no difficulty turning. Because the rotation speed of the front and rear drive shafts may be different when the car is turning, if forced to rotate at the same speed, it will cause power loss in the transmission system, resulting in engine power consumption, increased fuel consumption and tire wear, reducing the life of the transmission system, etc. With the inter-axle differential, the front axle and the rear axle can rotate at different speeds, making the car run more freely and smoothly, and improving the traction, passability and stability of the car.
