The rear differential is an integral part of your vehicle that transmits torque and rotation through shafts running the length of the automobile. The rear differential allows all four of the vehicle's wheels to rotate at different speeds which are essential for road traction and stability. When a rear differential fails, it can cause vibration, noise and fluid leaks that impact a vehicle's acceleration and drivability. A driver should consult a certified mechanic to deal with a bad rear differential and prevent further damage to the vehicle's driving systems.
Noise in Gear from an Idle:
When the vehicle is turned on and first put into drive, there may be a rattle or clanking noise coming from the rear of the vehicle. This noise may be attributed to the drive shaft universal joints. These joints connect the transmission to the rear differential; and if they have worn down, they could impact the differential by forcing it to work harder, thus wearing down its gears. In order to check the gears of the rear differential.
Vibration and Fluid Leak:
Ripped universal joints will also cause vibration along the drive shaft and into the engine block via the transmission. This may be felt at high speeds in the body of the vehicle or through the floor. The rear differential and universal joints also have seals and use lubricant to work properly, and a leak or crack in a seal may contribute to vibration and failure of rear differential gears.
Burning Smell from Gearbox or Differential:
A burning smell from your differential or gearbox is another sign you need near differential oil. The smell may be coming from oil leaking out of an old seal you may even notice a reddish stain under your car's parking spot. The burning smell might also be a result of an overheating gearbox from poor lubrication. Too-old oil cannot lubricate moving parts properly, causing the metal components to burn oil from the high temperature.
Differential is just one of the many important lubrication fluids that vehicles use in their normal operation.