SKU: ALL 67502
UPC: 848238067927
MPN: ALL67502
The Allstar Performance Ford 9in Axle delivers 31 spline strength for builders running Ford 9 inch rear ends in street cars, drag machines, and circle track applications. This cut-to-fit flanged axle arrives at 33 inches, allowing precise trimming to match your housing width without ordering custom lengths. Constructed from 1541 carbon steel, the shaft handles the torque demands of modified powertrains while remaining accessible for weekend warriors who need durability without exotic alloy pricing. For shops building Ford 9 inch setups, this axle pairs with 31 spline carriers and large bearings for a straightforward bolt-in installation.
Allstar engineered this axle with a 5.94-inch outer diameter flange featuring 0.470-inch thickness for structural rigidity under load. The triple-drilled bolt pattern accommodates 5 x 4.50-inch, 5 x 4.75-inch, and 5 x 5.00-inch wheel bolt circles, eliminating the need to stock multiple axle configurations. Studs press into 0.687-inch holes, and the 3.060-inch hub register ensures consistent centering. With 9 inches of spline engagement, power transfer remains secure through hard launches and high-rpm shifts. The natural finish leaves options open for builders who prefer their own coatings or corrosion treatments. This axle requires large Ford 9 inch bearings, so verify your bearing setup before installation.
Whether you're staging at the strip or turning laps on dirt, 31 spline axles provide the torsional strength to survive repeated abuse. The cut-to-fit design means one part number covers a range of housing widths, simplifying inventory for racers who swap rearends between vehicles. Pair this axle with quality ring and pinion sets and a solid drivetrain foundation for a complete Ford 9 inch build. We stock Allstar Performance components alongside the hardware you need to finish the job right.
This axle features triple-drilled flanges accepting 5 x 4.50-inch, 5 x 4.75-inch, and 5 x 5.00-inch bolt patterns. This covers most common wheel configurations for Ford applications, from Mustangs to full-size cars running the Ford 9 inch platform.
No. Allstar specifies this axle for large bearing applications only. If your Ford 9 inch housing is set up for small bearings, you will need to convert to large bearings or select a different axle designed for small bearing use.
Measure your housing width from seal surface to seal surface, then subtract for bearing and seal dimensions per your specific setup. Cut from the splined end using a quality abrasive cutoff wheel, keeping the shaft cool to avoid hardness changes. Deburr and chamfer the cut end before installation.
For most street and bracket racing applications under 700 horsepower, 1541 carbon steel provides reliable service. Higher power builds or cars making repeated passes at high trap speeds may benefit from chromoly alloy shafts, but 1541 remains the standard for cost-effective durability.
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