According to Baidu Youjia, it is known that the front drive transmission shaft of an automobile is broken, and it is a common way to replace the transmission shaft assembly. The transmission shaft is a rotating body with high rotating speed and small support. It is the shaft that can transmit power in the transmission shaft of universal transmission device, so its dynamic balance is very important. Generally, the transmission shaft should be tested for dynamic balance before leaving the factory and adjusted on the balancing machine. For a car with front engine and rear wheel drive, it is to transfer the rotation of the transmission to the main deceleration.

The transmission shaft assembly consists of shaft tube, telescopic sleeve and universal joint. The telescopic sleeve can automatically adjust the change of the distance between the transmission and the drive axle. Universal joint is to ensure the change of the included angle between the transmission output shaft and the drive axle input shaft, and realize the equal angular velocity transmission of the two shafts.