The propeller shaft is unbalanced, and it usually starts to shake after more than 20 yards. Here's what you can do:
1. When the transmission shaft of the car is unbalanced, there will be periodic sounds during driving, and the faster the driving speed, the louder the sound. In severe cases, it can make the body tremble, the cab vibrate, and the steering wheel can feel numb. Due to the shaking of the body, the parts of the vehicle will loosen, resulting in an accident. The cab vibrates, which can cause cracking of the solder joints. Therefore, the transmission shaft is unbalanced, endangering the safe driving, and the transmission shaft unbalance fault should be repaired and dealt with as soon as possible.
2. The possible reasons for the dynamic imbalance of the transmission shaft are: the balance weight on the transmission shaft falls off, the transmission shaft is bent or the transmission shaft tube is dented, the transmission shaft tube and the universal joint are not welded properly or the transmission shaft is not overbalanced and calibrated, telescopic and installation is dislocated, resulting in the universal joint forks at both ends of the transmission shaft are not in the same plane and do not meet the constant velocity transmission conditions.
