What is a spool differential and why would I use one?

A spool is a differential replacement that locks both rear wheels together permanently. This ensures both wheels receive power simultaneously, providing maximum traction for off-road or drag racing applications where consistent grip is essential.

Is this spool compatible with my Ford 8.8" axle if it has a different spline count?

This specific Yukon spool is designed for Ford 8.8-inch rear axles that use 31-spline axles. It is crucial to verify your axle's spline count before purchasing to ensure proper fitment.

What are the implications of using a spool on a street-driven vehicle?

Spools are not recommended for street-driven vehicles because they lock both wheels together. This can make turning more difficult, especially at lower speeds, and can lead to increased tire wear and potential drivetrain stress during normal road use.

Yukon Gear Steel Spool for Ford 8.8in 31 Spline Axles YP FSF

Name: Yukon Gear Steel Spool For Ford 8.8in w/ 31 Spline Axles
Brand: Yukon Gear & Axle
Price: 675.89 USD
Availability: InStock

Yukon Gear Steel Spool For Ford 8.8in w/ 31 Spline Axles

$675.89

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Yukon Gear Steel Spool for Ford 8.8in w/ 31 Spline Axles. Converts diff to 100% lockup for maximum traction in off-road and racing applications.

Key Features

Fits Ford 8.8" rear axles with 31 spline axles.
Provides 100% traction to both wheels at all times.
Constructed from high-quality 8620 steel for strength.
Heat-treated for additional durability.
Installs in place of the original differential carrier assembly.
Designed for dedicated off-road and drag racing vehicles only.

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Will this fit your vehicle?

Product Details

Yukon Gear & Axle is well-known for building strong drivetrain components for demanding applications. This Yukon steel spool is designed to convert your Ford 8.8-inch rear axle with 31-spline axles into a 100% locked differential. This means both rear wheels will always receive power, providing maximum traction for dedicated off-road use or drag racing. It's a cost-effective way to achieve full-time locked performance, installing directly in place of your original differential carrier assembly.

Each spool is constructed from high-quality 8620 steel, then heat-treated to ensure it can handle the stresses of performance driving. This solid construction is built for strength and long life in specialized vehicles. Because it locks both wheels together, this spool is not recommended for street-driven vehicles, as it can make turning more difficult and increase tire wear under normal driving conditions.

This spool fits a wide range of Ford vehicles equipped with the 8.8-inch rear axle and 31-spline axles, including models like the Ford Bronco, Crown Victoria, and F-150. If you're building a dedicated off-road rig or a drag car where maximum traction is the priority, this Yukon spool is a solid option to consider.