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Yukon Gear YPKF9-SG-01 is a replacement side gear with hub for Ford 9-inch differentials using 31-spline axles. It is suited for compatible standard open differential and Trac-Lok positraction applications, providing an individual internal carrier component for replacing a worn or damaged side gear without purchasing a complete spider gear kit.
This hubbed side gear is intended for differential carrier repair, restoration, and internal gear replacement where the existing carrier remains serviceable. Replacing the individual side gear can address localized wear or damage while retaining the rest of the compatible differential assembly.
Ford 9-inch differentials were used across a wide range of classic Ford, Lincoln, and Mercury cars, trucks, vans, and performance platforms. YPKF9-SG-01 supports compatible 31-spline applications in vehicles such as Mustang, Bronco, F-Series, Fairlane, Galaxie, Torino, Ranchero, Thunderbird, Cougar, and related models.
Key Features & Specs:
Product Type: Differential side gear
Differential Fitment: Ford 9"
Axle Spline Count: 31-spline
Differential Type: Standard open differential and Trac-Lok positraction
Style: Side gear with hub
Hub: Included
Quantity: 1 side gear
Service Use: Differential carrier repair and internal gear replacement
Brand: Yukon Gear & Axle
Part Number: YPKF9-SG-01
UPC: 883584161615
Proxy Number: 16161
Fitment:
Ford 9" standard open differential with 31-spline axles
Ford 9" Trac-Lok positraction with 31-spline axles
Select Ford Mustang, Bronco, F-100, F-150, Fairlane, Falcon, Galaxie, Gran Torino, LTD, Maverick, Ranchero, and Thunderbird applications
Select Ford E-Series van applications
Select Lincoln Continental and Mark III applications
Select Mercury Cougar, Comet, and Grand Marquis applications
About Yukon Gear Differential Side Gears:
Yukon Gear & Axle differential side gears are individual replacement components used to service worn or damaged internal carrier gearing. Application-specific gears such as YPKF9-SG-01 allow the existing differential assembly to remain in service when only the side gear requires replacement. They are useful for restoration, performance, truck, van, and general drivetrain service involving compatible Ford 9-inch open or Trac-Lok differentials.
