What are the causes of excessive rear axle temperature?

[MacOlive]

The causes of excessive rear axle temperature are as follows: 1. Deterioration of gear oil, improper oil discharge requirements, or insufficient fuel quantity; 2. Over-tightened bearing adjustment; 3. Excessive clearance between the driven gear and the thrust washer of the main reducer; 4. Insufficient adjustment of the meshing gap between the half-shaft gear and the planetary gear; 5. Overly tight oil seal leading to poor lubrication between moving bearings, which can easily cause dry or semi-dry friction. When the owner discovers that the rear axle is overheating, they should promptly inspect it and carry out timely repairs according to certain regulations. If touching the active gear bearing housing of the rear axle feels hotter than other components or is too hot to touch, this indicates that the bearing assembly is too tight. The clearance between the bearing and the gear needs to be adjusted, and the hypoid gear oil should be replaced or replenished according to certain regulations to prevent accidents. If the rear axle is generally hot upon inspection, the gear oil level should be checked. If the oil level is too low, the overheating is caused by insufficient gear oil quantity.