How a Differential Works and Types of Differentials
http://www.youtube.com/watch?v=gIGvhvOhLHU
Diagnosing Differential Noise
Vehicles make many sounds. Most are normal while the vehicle is in motion. But there are times when a noise coming from under the car can be a serious matter. Here are a few common “noises” that may come from the rear axle that need immediate attention:
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