Differentials have so many different aspects to consider that many times the most important aspects are overlooked by trivial theory. The Ford 9" is usually considered the underdog with it's long lasting reputation questioned as to the why it got that way. Many times the answer is not sufficient and lacks the whole story. Although the Ford 9" is considered the most versatile differential due to it's light weight, inherent strength and economical components, there is a lot more to it than that. No, the Ford 9" is not "the best there is", but close. It's good points are often overlooked...