What is a differential spool and why is it not recommended for street use?

A differential spool locks both axle shafts together, sending 100% of the engine's power to both wheels constantly. This provides maximum traction for off-road or racing applications. However, it makes turning more difficult on pavement and can cause excessive tire wear and drivetrain stress, so it's generally not recommended for daily street driving.

What vehicles does this Yukon Gear differential spool fit?

This spool is designed for Ford 10.25/10.5 inch differentials with 35 spline axles. It fits a variety of Ford trucks and SUVs, including models like the F-150, F-250, F-350, E-250, E-350, and Excursion, with model years ranging from 1985 to 2019.

Does this differential spool come with all the necessary installation hardware?

The manufacturer's description focuses on the spool itself and its specifications. It's recommended to consult the installation instructions or contact Yukon Gear & Axle directly to confirm if any additional hardware is included or required for installation.

Yukon Gear Differential Spool 10.25/10.5 35 Spline YP FSF10.

Name: Yukon Gear Steel Differential Spool for Ford 10.25/10.5 w/35 Spline Axle
Brand: Yukon Gear & Axle
Price: 773.85 USD
Availability: InStock

Yukon Gear Steel Differential Spool for Ford 10.25/10.5 w/35 Spline Axle

$773.85

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Yukon Gear Steel Differential Spool for Ford 10.25/10.5 w/35 Spline Axle. Delivers 100% power to both tires for maximum traction.

Key Features

Fits Ford 10.25/10.5 inch differentials with 35 spline axles.
Installs in place of the spider gears in a standard open carrier.
Delivers 100% power to both tires at all times for maximum traction.
Features a 45-degree pressure angle engineered for stock shafts.
Not recommended for street-driven vehicles due to full-time lockup.
Constructed from high-quality materials for strength and long life.

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Will this fit your vehicle?

Product Details

What you get here is a Yukon Gear & Axle steel differential spool, designed to replace the spider gears in your Ford 10.25 or 10.5 inch differential. This part is built to give you full-time lockup, meaning 100% of the engine's power is sent to both rear wheels at all times. This is a serious upgrade for off-road vehicles, drag racers, or anyone who needs maximum traction and doesn't plan on much street driving. It's compatible with Ford 10.25/10.5 differentials and 35-spline axles.

This spool is engineered with a 45-degree pressure angle, which is specifically designed to work with stock shafts. This aggressive angle helps ensure consistent power transfer, so you won't have to worry about wheel spin on challenging terrain. Because it locks both wheels together, it's a great way to enhance your off-road capabilities, whether you're navigating rocky trails or deep mud. It's important to note that this type of full-time lockup is not recommended for street-driven vehicles, as it can make turning more difficult and cause tire wear.

Yukon performance spools are made from high-quality materials to ensure strength and longevity in demanding applications. This differential spool is a solid option for those looking to maximize traction and power delivery. It fits a range of Ford trucks and SUVs, including models like the Ford F-250 Super Duty, Ford Excursion, and Ford E-350 Super Duty. If you're building a dedicated off-road rig or a competition vehicle, this spool can help you unleash its full potential.