What is a differential dropout assembly?

A differential dropout assembly, also known as a third member, is the entire gear and differential unit that slides into the rear axle housing. This assembly comes fully built and shimmed, ready to be installed into your vehicle's existing rear end.

What is the benefit of a steel spool differential?

A steel spool differential replaces the open or limited-slip differential with a solid unit that locks both rear axles together. This provides maximum traction in off-road or high-performance situations by ensuring both wheels receive power simultaneously.

Does this assembly come with everything needed for installation?

This Yukon dropout assembly comes complete with the third member, gears, spool, yoke, and is pre-shimmed and backlashed. You will need to add differential fluid and a differential cover to complete the installation.

Yukon Gear Dropout Assembly for Toyota 8in Rear Differential w/Steel Spool 30 Spline 4.88 Ratio

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Specifications

Brand: Yukon Gear & Axle
Part #: YDAT8-488SPL
UPC: 883584132592

Yukon Gear Dropout Assembly for Toyota 8in Rear Differential w/Steel Spool 30 Spline 4.88 Ratio

Name: Yukon Gear Dropout Assembly for Toyota 8in Rear Differential w/Steel Spool 30 Spline 4.88 Ratio
Brand: Yukon Gear & Axle
Price: 1401.42 USD
Availability: InStock

$1401.42

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Fits 1979-1995 Toyota Pickup. Yukon Gear dropout assembly with steel spool for maximum traction.

Key Features

Fits 1979-1995 Toyota Pickup and 1984-1995 Toyota 4Runner.
Complete, fully assembled third member differential dropout.
Features a Yukon steel spool with a 1.785 inch journal for maximum traction.
Includes a nodular iron case for improved rigidity and power handling.
Comes with a 4.88 gear ratio and 30 spline count.
Includes the necessary yoke and is pre-shimmed and backlashed to spec.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Fits these vehicles

Toyota 4Runner 1984-1995
Toyota Pickup 1979-1995

Product Details

Yukon Gear & Axle is known for building strong drivetrain components, and this dropout assembly is a prime example of their expertise for your 1979-1995 Toyota Pickup or 1984-1995 4Runner. This isn't just a set of gears; it's a complete, fully assembled third member that's ready to drop into your rear differential housing. It comes expertly shimmed and backlashed to spec by Yukon technicians, meaning you can install it, bolt on the diff cover, add fluid, and get back on the road with confidence.

What really sets this unit apart is the upgraded Yukon steel spool. This spool is designed for maximum traction and performance, making it a solid choice if you're pushing your vehicle's limits or need reliable power delivery. The nodular iron case is well-built to improve rigidity and handle more power, reducing deflection so the gears maintain consistent contact for a long service life. With a 4.88 gear ratio and 30-spline count, this assembly is engineered to work with your vehicle's setup for improved performance.

This dropout assembly includes the yoke and is ready for installation right out of the box. It's a comprehensive solution for anyone looking to upgrade their Toyota's rear differential with a robust and high-performing component.