Drivetrain› Differentials and Rear-End Components

Yukon Gear & Axle

Yukon Gear Steel Spool For Ford 9in w/ 31 Spline Axles

$360.89

SKU: Y001 YP FSF9-31

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Yukon Full Spools are a cost-effective way to convert a diff to 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each Yukon spool is made from high-quality 8620 steel and heat-treated for additional strength. A spool is an outstanding choice for dedicated off-road and drag racing vehicles only. It fits Ford 9" with 31 spline axles, features a lightweight design, and provides 100% traction to both wheels at all times. Not recommended for street-driven vehicles.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandYukon Gear & Axle
Part NumberY001 YP FSF9-31

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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