Most modern cars and light trucks have a differential. All-wheel drive vehicles need a differential between each set of wheels and a differential between the front and back wheels because the front wheels travel a different distance through a turn than the rear wheels. The differential transfers engine power to the wheels and adjusts to the difference in the wheel speed. The differential allows the wheels to turn at different speeds while maintaining control of the vehicle. The differential can experience heavy wear and tear. Noise coming from the differential can be a signal that your differential fluid may need to be serviced, or it can be a sign of worn gears or bearing due to regular wear and tear. America’s Auto & Tire can quickly diagnose and correct these types of issues.