Everyone must want to know the reason why the transmission shaft support is loose, so let's have a look together.

1. the flange connections (or connecting bolts) of the transmission shaft are loose, which affects the sound.

2. grease fittings (commonly known as grease fittings) and cross shaft oil passages are blocked and cannot be filled with grease, grease is not filled on schedule, and cross shaft oil seal

3. the installation configuration of universal cross shaft is too tight.

4. the loose fit between the sleeve and the fork hole of the universal joint, and the loose bolt of the support plate affect the rotation of the sleeve, so that the fork hole of the universal joint is excessively worn, and the looseness affects the noise.

5. the spline of the second shaft of the transmission and the internal spline of the flange are excessively worn, resulting in looseness and affecting the sound.

The transmission shaft is a high-speed, less supported rotating body, so its dynamic balance is crucial. Most transmission shafts are basically subject to dynamic balancing test before leaving the factory, and have been adjusted on the balancing machine. For rear wheel drive vehicles with front engine, the operation of the gearbox is transmitted to the shaft of the main reducer. It can be several joints, and the joints can be connected by universal joints.

The transmission shaft is composed of a shaft tube, an expansion sleeve and a universal joint. The telescopic sleeve can automatically adjust the change of the distance between the gearbox and the drive axle. The universal joint ensures the change of the included angle between the output shaft of the gearbox and the input shaft of the drive axle, and realizes the constant angular speed transmission of the two shafts.