Chevy Differentials. Jefferson Bryant

      Varying Speed: Many axle issues become evident when you quickly accelerate and decelerate using the throttle. When you do this test, you are loading and unloading the gears and bearings. Clunking or banging is evidence of worn bearings or seriously worn gears.

      Coasting: If you hear a howl or whine when the vehicle is coasting, you most likely have a worn-out pinion bearing.

       Worn Bearings