What Causes the Differential to Make Noise When Low on Oil?
2 Answers
Differential noise due to low oil: 1. Engine noise: When the engine misfires or the spark plugs are excessively worn, the engine will produce abnormal noises and vibrations. In such cases, it is necessary to take the vehicle to a repair shop or 4S store for professional inspection of the engine. 2. Brake noise: Brake noise is usually caused by excessive wear of the brake pads. The thickness of brake pads is generally 10mm, and when they wear down to below 6mm, they should be replaced promptly. 3. Tire noise: Tire noise is caused by issues such as bulging or out-of-round tires. When tire problems occur, the car will not only produce abnormal noises but also exhibit abnormal body vibrations. In such situations, the tires should be repaired or replaced immediately.
I've seen quite a few cases of differential oil deficiency. When it's low on oil, it's very prone to producing abnormal noises like humming or squeaking. The gears inside the differential rely entirely on lubricating oil to cushion friction and cool down during high-speed operation. If there's insufficient oil, the gears will grind directly against each other, metal against metal, which naturally creates noise. If you continue driving under these conditions, you might notice overheating and even smell burning. Long-term dry grinding can cause permanent wear to the gears, and in severe cases, the entire differential could be ruined. It's advisable to check the oil level immediately upon hearing abnormal noises, and it's best to go to a repair shop to have the oil replaced. For regular maintenance, it's good practice to change the differential oil every 30,000 to 40,000 kilometers. When changing the oil, check for any metal shavings in the fluid to assess the internal wear condition.
