The Yukon Chromoly Axle Shaft (YA WF10.5-35-34.50) is a high-performance replacement axle built for Ford 10.5″ rear differentials. It’s right side only, 35-spline, with a length of 34.50″, and crafted from 4340 chromoly for strength and durability. 

Specifications & Features

• Part Number: YA WF10.5-35-34.50 (sometimes abbreviated YA WF105-35-3450)
• Application: Ford 10.5″ rear differential, right side installation 
• Spline Count: 35 splines 
• Axle Length: 34.50″ overall length 
• Construction: 4340 chromoly steel — cold-roll formed splines and advanced heat treatment for rigidity and wear resistance 
• O-Ring Groove: At the hub end (for seal compatibility) 
• Pricing: $430.89 USD per shaft 

Fitment & Compatibility

• Designed for Ford Super Duty trucks using the 10.5″ rear diff assembly.
• Fits right-side (passenger side) axle position.
• Should be used in a differential housing compatible with 35-spline Ford 10.5″ setups.

Why Choose This Yukon Axle?

• Built for Strength: 4340 chromoly material and cold-roll spline process result in high fatigue resistance under load. 
• Fixture Accuracy: OEM-compatible sizing and O-ring groove for ease of installation and sealing integrity.
• Service Ready: Ideal for axle rebuilds, upgrades, or replacement when stock axles are worn or damaged.

Installation & Service Notes

• Install with proper lubrication (gear oil) and torque specs per OEM service manual.
• Inspect bearing and seal compatibility during install.
• Confirm proper orientation (right side) to avoid mismatch.

Questions? We’re Here to Help.

Have questions about suspension or drivetrain upgrades for your truck? Our team at FASS Motorsports is here to assist:

• Phone: 636-429-7020
• Email: [email protected]