How wide is a 9 inch Ford rear end?

Ford 9 Inch Rear End Width
The width of a Ford 9 inch rear end can vary depending on the specific model and year it was produced. The 9 inch rear axle was manufactured in seven different housing widths, ranging from 57-1/4 to 69-1/4 inches wide, with any of these widths potentially being ideal for a particular chassis.
When attempting to identify Ford 9 inch rear end specs, several indicators can help. First, the Ford 9 has a third member bolted to the front of the axle housing, and there is not a traditional rear housing cover as is found with many other rear ends. Ford 9 housings were produced from 1957 through 1986, and they were installed in nearly every Ford passenger car and truck at one time or another.
In terms of aftermarket production, many companies produce 9 Ford equivalent rear axles for the drag racing and hot rod industry. The Ford 9 inch housing is a semi-floating, drop-out axle, and because of its strength, it is used in a wide variety of cars, trucks, and custom vehicles.
It’s important to note that the width of a specific Ford 9 inch rear end can be determined by measuring the distance between the axle flanges located on the outward end of each axle tube. Some axles are more desirable than others, and favorites among circle track racers include rear axles from specific models and years, such as 66-70 full-size Fords and Mercurys, 71-72 Lincolns, and 68-72 F100 Ford trucks.
In summary, the width of a 9 inch Ford rear end can vary, and it’s essential to consider the specific model and year of production when determining its width.

When did Ford stop using the 9 inch rear end?

Ford stopped 9 inch rear axle production in 1986. It was then replaced by the Ford 8.8 inch rear axle.

What is so special about a Ford 9-inch rear end?

One of the features which distinguishes this axle from other high-performance or heavy-duty domestic solid axles is that unlike other axle designs, access to the differential gears is not through the rear center cover; rather, in the Ford 9 inch, the rear cover is welded to the axle housing, and access to internals is …

How much horsepower can a Ford 9 inch handle?

“They’re good only to 400hp max,” says Tom at Tom’s Differentials. “Anything above that should use today’s beefed-up, redesigned, nodular-iron aftermarket cases. They’re good to 800 hp, if built properly. The next step beyond that would be the high end, completely redesigned, Mark Williams billet-aluminum housing.

How wide is a Ford 9 inch axle?

The 9” rear axle was manufactured in seven different housing widths, from 57-1/4” to 69-1/4” wide, any of which may be ideal for a particular chassis. Determine housing width by measuring the distance between the axle flanges located on the outward end of each axle tube.

How much HP can a Ford 9-inch rear end handle?

A 9-Inch For Every Need
GearFX offers a wide range of Ford 9-Inch rear ends, with strength ratings that range from 650-hp to 1000-hp and beyond. Their most popular setups are their S- and N-Series rear ends.

How are Ford 9 axles measured?

Total width-this is the total width of the assembled rear end measured from the outside of one axle flange to the outside of the other. Backing plate to backing plate means nothing when measuring for a rear end so forget about that way of measuring.

Why is the Ford 9-inch so strong?

The Ford nine-inch, introduced in 1957, incorporated all that smart thinking but had distinct advantages. First, there’s the diameter of its ring gear at—you guessed it—nine inches. That’s larger and thus stronger than most contemporaries. Ford engineers increased the angle of the pinion’s teeth, as well.

What is the offset on Ford 9-inch rear end?

The tried-and-true Ford 9-inch is offset 15/16-inch, Ford’s 8.8-inch housing is offset 9/16-inch from the factory, and GM 10- and 12-bolts rears are offset 1/2-inch, for example.

Why is the Ford 9 inch so strong?

The Ford nine-inch, introduced in 1957, incorporated all that smart thinking but had distinct advantages. First, there’s the diameter of its ring gear at—you guessed it—nine inches. That’s larger and thus stronger than most contemporaries. Ford engineers increased the angle of the pinion’s teeth, as well.

How do you measure rear end width?

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