A: (1) Fault phenomenon:
When the car is driving, check the temperature of the rear axle. If there is a hot feeling, the reason is as follows.
① bearing assembly is too tight;
② main and driven wheel gear meshing clearance is too small
③ lack of lubricating oil or lubricating oil is too thin.
(2) Diagnosis and elimination:
After the car has been driving for a long distance, stop the car and check the drive axle by hand. It is normal for the car to be hot. If the bearing feels hot, it means that the bearing assembly is too tight; if it is generally overheated, it means that the lubricating oil is missing or the gear meshing gap is small.