Yukon Gear Stub Axle Bearing For Ford 7.5in Irs / 8.8in Irs & 8.8in IFS

Stub Axle Bearing for Ford 7.5-Inch IRS, 8.8-Inch IRS, and 8.8-Inch IFS Differentials

The Yukon Gear YUKYB AX-009 is a precision-machined stub axle bearing engineered as a direct OEM replacement for Ford independent rear suspension and independent front suspension differential applications. The YUKYB AX-009 fits the Ford 7.5in IRS, 8.8in IRS, and 8.8in IFS axle assemblies found in F-150, Expedition, Explorer, Mustang, and Thunderbird platforms from 1989 through 2016. Sourced to tight OEM dimensional tolerances, this bearing delivers correct preload, proper fit, and long service life under the full radial and lateral loads of cornering, braking, and acceleration. Installing this bearing restores noise-free operation to differentials with worn or failed stub axle bearings.

Key Features

• Direct OEM-replacement bearing for Ford 7.5in IRS, 8.8in IRS, and 8.8in IFS axle assemblies
• Precision machined to factory dimensional tolerances for correct preload and fit
• Handles full radial and lateral loads from cornering, braking, and acceleration
• Wide fitment spanning 1989-2016 Ford F-150, Expedition, Explorer, Mustang, and Thunderbird
• Sold as a single bearing unit; order two for a complete axle service
• Lifetime Limited Warranty from Yukon Gear and Axle

Specifications

Fitment

What's Included

• 1x Yukon Gear stub axle bearing for Ford 7.5in IRS, 8.8in IRS, or 8.8in IFS

Frequently Asked Questions

What symptoms indicate a failed stub axle bearing in a Ford IRS differential?
A humming, grinding, or clicking noise that changes with vehicle speed or load, excess play at the stub axle, and oil contamination in the differential from a failed bearing seal are the primary indicators. In severe cases, stub axle bearing failure can cause loss of axle shaft retention.

Does this bearing fit both the 7.5in and 8.8in Ford IRS applications?
Yes. The YUKYB AX-009 is engineered to fit the Ford 7.5in IRS, 8.8in IRS, and 8.8in IFS stub axle positions. Verify your specific axle type before ordering, as the fitment list covers a broad range of Ford platforms.

Is this sold as a single bearing or as a pair?
This listing is for a single bearing. Order two for a complete axle service on both sides.

What Ford Mustang models use the 8.8in IRS?
The 1999-2004 Mustang Cobra and the 2011-2016 Mustang GT, GT500, and Boss 302 use the 8.8in IRS. Standard Mustang GT and V6 models through 2010 used a solid rear axle, not IRS.

Does replacing the stub axle bearing require removing the differential carrier?
Stub axle bearing replacement on the Ford IRS typically requires removing the stub axle from the differential side gears and using a bearing press to remove and install the bearing. The carrier does not need to be removed in most cases. Refer to the factory service manual for the specific procedure.

What is the warranty on this bearing?
Yukon Gear backs the YUKYB AX-009 with a Lifetime Limited Warranty. This Lifetime Limited Warranty covers defects in materials and workmanship for the life of the product.

Is special tooling required to install this bearing?
Yes. A bearing press and the appropriate bearing driver are required to properly seat the bearing without damaging the race or housing. Do not use a hammer or improvised tools.

What is the difference between IRS and IFS applications for this bearing?
IRS (independent rear suspension) and IFS (independent front suspension) refer to whether the differential is at the rear or front axle. The stub axle bearing function is the same in both applications, supporting the axle stub under lateral and radial loads.

Installation Notes

• Use a bearing press and the correct driver to remove the old bearing and install the new one; pressing out of alignment damages the housing
• Inspect the stub axle journal surface for scoring or damage before installing the new bearing
• Verify the bearing seats fully against the housing shoulder before reassembly
• Check differential fluid level and condition after YUKYB AX-009 installation; replace fluid if contaminated
• Road test and confirm the noise or symptom that prompted the repair is resolved before returning the vehicle to service

California Prop 65 Warning

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.