The truck drive shaft is broken generally because the drive shaft is bent and deformed. It is possible that the deformation of the girder caused the transmission shaft to be bad. In addition, the universal joint of the drive shaft is often butter, universal joint due to lack of oil resulting in universal joint open movement. This causes the transmission shaft to deform. If the vehicle starts with the sound of stacking, long time use will lead to deformation of the transmission shaft and damage of the universal joint fork! So check the drive shaft often and butter the universal joint.