When our transmission shaft is loose, we should first check whether the spline shaft has irreparable hard injuries such as distortion and deformation. The transmission shaft is an object with high speed and little support. If the looseness, distortion and deformation of the transmission shaft are not detected and repaired in time, it can still be dealt with in the daily driving state. Once the wheelbase needs to be greatly adjusted, it is likely that the structure of the universal joint will be damaged because the distorted shaft cannot be effectively telescopic adjusted, and even the whole transmission shaft may be damaged, which is not worth the loss.

For hard injuries such as distortion and deformation, the transmission shaft must be removed from the car, and a complete internal inspection can be carried out after disassembly. If you only carry out simple observation from the outside, it is sometimes easy to ignore such large injuries.

In case of looseness or even routine inspection and maintenance, we need to pay attention to the detection of universal joint spider. You may ask, why do you say so?

Because the cross shaft is the absolute connecting body in the whole universal joint structure. Without the cross shaft, the universal drive is impossible to speak of. Among them, the bearing needle in the structure is a very easily damaged part, which often causes fracture or even crushing under strong impact. We should regularly check and maintain the spider after long-time driving or extreme driving to see if there is any damage that needs to be replaced.