Yukon High Performance Yukon Ring & Pinion Gear Set for GM 8.5in Olds Rear 3.90 Ratio

This Yukon Gear & Axle ring and pinion set features a 3.90 ratio, designed to fit GM 8.5-inch Oldsmobile rear ends. The gear tooth surface finish is specifically designed to reduce friction and heat, which is crucial for handling high torque conditions and extended use, especially when you've added more horsepower or larger tires to your vehicle. Yukon uses high-grade steel for both the ring and pinion components, ensuring a well-built part that meets OEM specifications for fitment. This means you can expect a direct fit into your rear differential, simplifying the installation process. Choosing the right gear ratio can significantly change how your vehicle performs, affecting acceleration and highway cruising. The 3.90 ratio is a popular choice for those looking to improve acceleration off the line while still maintaining reasonable cruising RPMs on the highway, especially when paired with larger tires.

Yukon engineers put these gear sets through rigorous design and testing processes, utilizing in-house quality labs to ensure they meet exacting standards. This attention to detail in manufacturing means you're getting a reliable component that's built to last. The high-grade steel construction provides the strength needed to handle the demands of increased power and torque. This set is designed to work with rear ends that originally came with 2.93 to 3.23 ratios, and requires a 2.93-3.23 case for proper installation.

When you purchase this Yukon Ring & Pinion set, it comes with a one-year warranty against manufacturing defects. Additionally, Yukon offers the Y.E.S. Plan, a lifetime protection plan that covers your gears for as long as you own your vehicle, offering significant peace of mind for this important drivetrain component.