The transaxle is the mechanism at the end of the driveline that changes the speed and torque from the transmission and transmits them to the drive wheels. The drive axle is generally composed of the main reducer, the differential, the wheel transmission device and the drive axle housing, etc., and the steering drive axle has a constant speed universal joint. In addition, the drive axle also has to withstand the vertical force, longitudinal force and transverse force acting on the road and between the frame or body, as well as the braking torque and reaction force.