The rear axle of a car refers to the power transmission part of the rear drive shaft. It consists of two half axles that enable differential motion. The rear axle is also used to support the wheels and connect the rear wheels.
Rear axle overheat diagnosis and elimination
Check the heating condition of every part in the drive axle. In the case of local overheat of the oil seat, the fault is caused by overly tightened tight oil seal. In the case of local overheat of the bearing, the fault is caused by bearing damage or improper adjustment. If neither the oil seal nor the bearing is overheated, the fault is caused by too small back clearance between the thrust gasket and the driven gear of the main reducer.
Rotate the flange of the main reducer gently. If the rotation angle is too small, the fault results from too small meshing clearance of the main reducer gear. If the rotation angle is normal, the fault results from too small meshing clearance between the differential planetary gear and the half axle gear.
Precautions for repairing an overheated rear axle
If real axle overheat is discovered, the car should be stopped in time to check whether there is a lack or degradation of lubricating oil, whether the meshing clearance between the driving and driven reduction gears is too small, and whether the bearing has been installed too tightly.
Touch the bearing housing of the real axle driving gear with a hand. If the temperature is higher than other parts and it feels hot, the bearing has been installed too tightly. Adjust the gear and bearing clearance, add or replace hypoid gear oil properly, and repair it in a timely manner.
