Why Doesn't the Differential Hum at Low Speeds?

[PaigeAnn]

Differential humming at low speeds mainly has the following reasons: Insufficient Lubricating Oil: If the differential lacks lubricating oil or the quality of the oil is poor, it can easily cause abnormal noise from the differential. In this case, simply replenishing the lubricating oil will suffice. Worn Differential Gears: If the gears are worn, they cannot properly mesh with other components during operation, causing friction between parts and leading to abnormal noise from the differential. In this situation, the gears need to be replaced. Improper Gear Adjustment: Similarly, if the spacing between the gears is not properly adjusted, it can also cause abnormal noise. In this case, the spacing needs to be readjusted. Foreign Objects in the Differential: When foreign objects such as mud or sand get stuck in the differential, they can also cause abnormal noise.