Ford 9" Axle Shaft Gauge

Ford 9" Axle Shaft Gauge

Quickly visualize axle shaft placement and pinion alignment on your Ford 9" housing.

This bolt-on gauge gives you a fast and reliable way to see exactly where your axle shafts will land in relation to the pinion centerline. The machined slit marks the pinion center, while the rectangular cutout indicates the natural gap between the shafts. Whether you're building a custom-width housing or double-checking stock dimensions, this tool saves time and prevents guesswork.

The gauge helps confirm you're getting enough spline engagement — you generally only need about 75%. You can measure right up to the edge of the box and subtract roughly 1/8" for a safe and accurate reading. It’s a straightforward tool that can make a big difference when you’re cutting or ordering shafts.

• Part Number: R1458
• Bolts directly to Ford 9" axle housings
• Slit marks pinion centerline for precise reference
• Cutout box shows axle shaft gap zone
• Useful for shaft length planning and housing setup
• Speeds up custom builds and reduces rework

Note

You typically only need 75% spline engagement. Measure to the edge of the box and subtract about 1/8" for best results.