The difference between the steering axle and the steering axle is that everything is hollow, the beam becomes the axle housing, and the steering knuckle becomes the steering knuckle housing because there is more root drive shaft inside. This drive shaft is divided into two half shafts by being divided into two by a differential located in the middle of the axle housing. The two straw hats are not simply placed on the head, but are also directly connected to the two half shafts inside. The half shaft also has one more joint in the "neck" position - the universal joint, so the half shaft also becomes two parts, the inner half shaft and the outer half shaft.