Yukon YA F900001 1541H Alloy Rear Axle for Ford 9 Inch 77-Up 31 Spline

Vehicle Fitment

• Any vehicle equipped with a Ford 9" differential, 1977 and newer (universal, axle-specific fitment)

Fitment Notes

• 31-spline configuration - a 35-spline variant (YA F900001-35SP) is also available for higher-spline applications
• Sold individually; confirm quantity needed for a full axle pair

Features

• Manufactured from 1541H high-strength alloy steel
• Heat-treated deeper than factory axle shafts for added strength at the bearing and seal area
• Direct-fit replacement for Ford 9" rear axle applications
• Suited for off-road, street, and track use
• Built to handle increased torque loads over stock replacement axles
• Manufactured using the latest heat-treating technology for consistent durability

Specifications

• Differential application: Ford 9"
• Material: 1541H alloy steel
• Spline count: 31
• Length: 32"
• Model year applicability: 1977 and newer

Included Components

• 1x Rear Axle Shaft

Product Description

The Yukon YA F900001 is a 1541H alloy rear axle shaft built for Ford 9" differentials from 1977 and up, offering stronger-than-stock durability for street, off-road, or track use. Yukon heat-treats the shaft deeper than factory axles in the bearing and seal area, addressing one of the more common failure points on high-mileage or high-torque 9" setups.

At 31-spline and 32" in length, this axle is a direct replacement for a wide range of Ford 9"-equipped trucks and passenger cars from this era, making it a reliable choice whether you're repairing a broken shaft or proactively upgrading ahead of more power or larger tires.