Find Ford Mustang Differential Bearings Sizes. Replace Ford Mustang Differential Bearings & Ford Mustang Differential Bearings Replacement. Maintaining the differential bearings of your Ford Mustang is crucial for a smooth ride and enduring performance. Listen for a whining or howling noise under acceleration, which could signal that it's time for a replacement. To extend their lifespan, regularly check and maintain the proper level of differential fluid, and ensure it's free of contaminants. When selecting new bearings, opt for either tapered roller bearings for their load-handling prowess or ball bearings for reduced friction. Always choose high-grade steel bearings for longevity and consider professional installation to guarantee optimal functionality. With these considerations, you'll enhance your Mustang's drivability and maintain its legacy of power.