To transmit torque, two angled shafts connected on a transmission route must be connected by universal joints between them. This is mainly seen in the connection of the driveshaft, the steering shaft, the upper half shaft of the drive axle of the independent suspension, and the drive wheel shaft. Larger trucks generally use cross-shaft universal joints, and there are many models and specifications under cross-shaft universal joints, including 3102-2201025 Russian universal joint cross .

A cross-shaft universal joint, also known as an ordinary universal joint, is a kind of variable speed universal joint. It allows the maximum angle between two adjacent shafts to be 15°-20°. It is mainly used between transmission and drive axle. In the driveshaft or steering drive mechanism. The cross shaft rigid universal joint is mainly composed of the cross shaft, the universal joint fork, and the bearing. The holes on the two universal joint forks are respectively sleeved on the four journals of the cross shaft. Needle roller bearings and sleeves are installed between the cross shaft journal and the universal joint fork hole, and the screws with lock plates and the bearing cover are used for axial positioning. To lubricate the bearing, an oil passage is drilled in the cross shaft, which is communicated with the oil nipple and safety valve.

There are three general categories of universal joints, and there are many sub-categories below, such as the 5-7126X 6H2577 universal joint . The specifications and models are different, but the functions are the same.