- Manufacturing tolerances: The tolerances between the gears in the rear differential may be too loose, which can cause them to whine when they rotate.
- Gear damage: The teeth on the gears in the rear differential may be damaged, which can also cause a whining noise.
- Bearing failure: The bearings that support the gears in the rear differential may be worn out or damaged, which can cause a whining noise.
- Low fluid level: The rear differential may be low on fluid, which can cause the gears to whine when they rotate.
- Incorrect fluid: The wrong type of fluid may be used in the rear differential, which can cause the gears to whine.
To determine the exact cause of the whine, it is recommended to have the rear differential inspected by a qualified mechanic.
