
Specifications
- Brand
- Yukon Gear & Axle
- Part #
- YG GM8.5-390
- UPC
- 883584241591

Yukon Gear High Performance Gear Set For GM 8.5in & 8.6in in a 3.90 Ratio
$504.89
Yukon Gear High Performance Gear Set For GM 8.5in & 8.6in in a 3.90 Ratio. Optimizes traction and performance for a wide range of GM vehicles.
Key Features
- Fits GM 8.5 inch and 8.6 inch axles.
- Features a 3.90 gear ratio for improved acceleration or tire compatibility.
- Constructed from high-grade steel for durability.
- Gear tooth surface finish is designed to reduce friction and heat.
- Designed to OEM specifications for a direct fit.
- Includes 10 ring gear bolts and a 30-spline pinion.
⚠️ 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
Product Details
Yukon Gear & Axle has built a solid reputation for making top-notch drivetrain components, and their high-performance ring and pinion sets are a prime example. This specific set is designed for GM 8.5-inch and 8.6-inch axles, featuring a 3.90 gear ratio. This ratio is a popular choice for those looking to improve acceleration or better utilize larger tires, especially after adding more horsepower to their vehicle. It's a well-made upgrade for trucks and SUVs like the Chevrolet Avalanche, Cadillac Escalade, or GMC Sierra.
What sets these Yukon gears apart is the attention to detail in their manufacturing. They use high-grade steel for both the ring and pinion, ensuring durability under demanding conditions. The gear tooth surface finish is specifically designed to reduce friction and heat buildup, which is crucial for long-term performance and reliability, especially in high-torque situations. Fitment is designed to OEM specifications, meaning you can expect a direct fit into your existing axle housing, simplifying the installation process. This careful engineering helps ensure that your investment in more power or bigger tires translates directly into improved performance on the road or trail.
When you're ready to re-gear your axle, choosing Yukon means you're getting a product backed by rigorous testing and a commitment to quality. They even offer a lifetime Y.E.S. Plan for comprehensive protection on your gear set. Keep in mind that this particular gear set does not have an ABS provision, so be sure to check your specific vehicle's requirements. Installation of a ring and pinion set is a complex job that requires specialized tools and knowledge; it's highly recommended to consult the manufacturer's installation instructions or have a professional mechanic perform the work to ensure proper setup and break-in.
Specifications
- Brand
- Yukon Gear & Axle
- Manufacturer Part #
- YG GM8.5-390
- UPC
- 883584241591
Frequently Asked Questions
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Yukon Gear High Performance Gear Set For GM 8.5in & 8.6in in a 3.90 Ratio
