Customer:"Hello? I'd like to buy an axleshaft for my Ford 9-inch rear axle." Salesperson:"No problem. Do you know what length, spline count, and wheel-bolt pattern you need?" Customer:"I really don't.

When the Ford 9-inch axle originally appeared in 1957 under the Fairlane and F-100 pickup truck, no one knew what an enduring legacy it would have. To put that in perspective, the top-of-the-line ...

There's no doubt that one of the most popular and most hyped rearends is the Ford 9-inch. As bulletproof as they come, it's become the go-to rear when it comes to a high-horsepower application, be it ...