Your rear differential is one of the most unappreciated parts in your car or truck. It does what might be the hardest job of all of those components, multiplying torque from your transmission and ...

Ever wonder how your car turns so effortlessly? The secret lies in a brilliant device called the differential. It lets your wheels spin at different speeds — essential for smooth, stable turns.

Pitching the stock differential out from under a GM car in favor of a 9-inch Ford has always been the best way to step up the drivetrain for drag racing. Since the price of used 12-bolts has ...