What is the purpose of a 5.13 gear ratio?

A 5.13 gear ratio is a numerically higher ratio than stock, meaning it will increase torque to the wheels. This is often done to compensate for larger tires, improving acceleration and bringing cruising RPMs back down on the highway.

What vehicles does this ring and pinion set fit?

This set is designed for GM 8.5-inch rear differentials and fits a wide variety of Buick, Cadillac, and Chevrolet models from 1980 to 2014, including popular vehicles like the Chevrolet Avalanche and Cadillac Escalade.

Does this ring and pinion set come with installation hardware?

This product includes the ring and pinion gears. Installation typically requires additional components such as bearings, seals, and shims, which are sold separately. Always refer to the manufacturer's installation guide for a complete list of required parts.

Yukon Gear & Axle Ring & Pinion 5.13 Ratio ZG GM8.5-513

Name: USA Standard Ring & Pinion Gear Set For GM 8.5in in a 5.13 Ratio
Brand: Yukon Gear & Axle
Price: 330.89 USD
Availability: InStock

USA Standard Ring & Pinion Gear Set For GM 8.5in in a 5.13 Ratio

$330.89

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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 & Axle is known for well-built drivetrain components. This 5.13 ratio ring and pinion set fits GM 8.5in differentials.

Key Features

Fits GM 8.5-inch rear differentials.
Features a 5.13 gear ratio.
USA Standard gear sets are designed to exceed OEM specifications.
Undergoes rigorous in-house quality evaluation for dimensional, material, and fitment testing.
Compatible with a wide range of Buick, Cadillac, and Chevrolet vehicles from 1980-2014.

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Will this fit your vehicle?

Product Details

Yukon Gear & Axle is a popular name for well-built drivetrain components, and this USA Standard ring and pinion gear set is no exception. If you're looking to change your vehicle's final drive ratio, this set offers a 5.13 ratio designed to exceed OEM specifications for your GM 8.5-inch differential. This is a common choice for owners who have modified their vehicles with larger tires and need to bring the gearing back into a more optimal range for acceleration and drivability.

Each USA Standard gear set undergoes rigorous in-house quality evaluation. This ensures that every set passes dimensional, material, and fitment testing before it leaves the factory. This attention to detail means you're getting a solid option for your differential rebuild. The 5.13 ratio is a significant change from stock, so it's often paired with larger tire sizes to compensate for the increased rotational speed needed to maintain highway cruising RPMs.

This ring and pinion set is designed for a wide range of GM vehicles equipped with the 8.5-inch rear axle, including models like the Chevrolet Avalanche, Cadillac Escalade, and Buick Rainier. When installing a new ring and pinion, it's important to follow the manufacturer's instructions carefully for proper gear pattern and break-in procedures to ensure longevity.