What are the consequences of not changing the rear axle oil?

[ReidRose]

If the rear axle oil is not changed for a long time, it is likely to deteriorate, thereby accelerating gear wear. In severe cases, it may also affect the vehicle's fuel economy. Below is relevant information about rear axle oil replacement: Replacement interval: For new vehicles, the rear axle oil should be changed during the 12,000 km maintenance. After that, the rear axle oil should be checked every 24,000 km. If obvious discoloration or thinning is observed, it should be replaced immediately. Screw holes: Generally, the rear axle has two screw holes—one is a vent hole, the bottom one is the drain hole, and the middle one on the axle housing is the oil level inspection hole and filling hole. To check for oil shortage, unscrew the middle screw; the oil level should be level with this screw hole when normal.