When it came time to lower the rear of our 1969 Ford F-100 project, we knew it was only best to drop the rearend and at least do a quickie "garage floor" rebuild before flipping the springs and ...

The Chevy 12-bolt axle shaft (left) is tapered; the Ford 9-inch shaft is the same diameter throughout its length, except for the short section just after the spline end. This makes it easy to narrow ...

There are many reasons to run a high-pinion differential in a 4WD vehicle, and there are many reasons to run a Ford 9-inch axle. When used in the front of a vehicle, high-pinion differentials ...

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.

From the archives: Legendary tech guru Marlan Davis explains why the 9-inch Ford is the strongest rearend out there—it’s all due to “hypoid distance.” To celebrate HOT ROD's 75th anniversary, we ...