The car running, issued a "woo, woo" sound, the faster the speed, the louder the sound, that is, the middle support failure. The above fault is specifically the transmission shaft intermediate bearing fault, and an abnormal sound. If the car in the start, there is a "grid, grid" sound, and a sense of vibration, is the middle support is not correct, fixed bolts loose, off, should be timely maintenance.

The way to check is to park the car on a flat ground, the car in neutral, with the hand twist the transmission shaft, if the resistance is very big, should check the transmission shaft intermediate support bolts fastening and the position of the intermediate bearing. If the rotating drive shaft feels loose, check the intermediate bearing and rubber sleeve of the hanger. If the bearing is short of oil, grease should be added. If the rubber sleeve is damaged, replace it. The main reasons for the damage of the middle support of the transmission shaft are as follows:

(1) insufficient grease causes bearing damage due to excessive wear.

(2) bearing manufacturing and installation quality problems, such as improper bearing installation, deflection.

(3) the fixing bolt of the support is loose, or the tightening of the fixing bolt is inconsistent.

(4) the transmission shaft is bent and deformed, resulting in unbalance and vibration, causing damage to the middle support of the transmission shaft.

(5) loose connection flange of the transmission end causes damage to the suspension of the transmission shaft due to excessive force.

(6) manufacturing quality problems of rubber sleeve and manufacturing defects of intermediate supporting framework.

Install the middle support of the transmission shaft, should use the following method: first install the middle support, fixed bolt belt thread after tightening to a certain extent, do not screw dead, with the hand disc moving the transmission shaft, should not be stuck, rotating the transmission shaft resistance should not be too big. Put up the middle and rear wheels, start the engine, rotate at low speed, put into low gear, and let the drive shaft rotate and align automatically. After aligning and fastening fixed bolts, attention should be paid to the consistent torque. On the transmission shaft bending deformation, vibration, should be removed from the transmission shaft, alignment, and the transmission shaft check, the main check dynamic balance. In the use of intermediate support bearings should often be lubricated, checked, found that the bolt loose should be tightened in time. Replace the assembly if the intermediate support plate of the drive shaft breaks.

The above contents are provided by xingtai yuantuo auto parts manufacturing co., LTD.

Company website: http://www.xtytwy.com