The differential allows the drive wheels to rotate at different speeds in turns without the wheel binding or hopping. If you have a rear-wheel drive vehicle, the differential is on the rear axle. If you have a front-wheel drive vehicle, the differential function is handled by your transaxle. Of course, all-wheel drive vehicles have differentials on both axles.

It is important to keep your differential properly lubricated. Differential fluid cools and protects the gears.

Differentials are built to last but may eventually wear out and need to be replaced. You might notice a strange noise from the axle area as one of the first warning signs. When the differential shows signs of failing, it’s important to repair it. If you leave it too long and it freezes up when you’re driving you could lose control of your vehicle and other parts like the axle, driveshaft, and transmission could be damaged. Signs of problems can be growling and whining noises that often come from differential gears or bearings.

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