Yukon Gear Grizzly Locker For Ford 9in w/ 31 Spline Axles

Yukon Gear & Axle is known for building tough drivetrain components, and their Grizzly Locker is a prime example of that commitment. If you're looking to significantly improve traction for serious off-road use, rock crawling, or drag racing, this mechanical locker is designed to handle extreme conditions. It works by sending 100% of the available power to both rear wheels simultaneously, ensuring that neither tire spins out when you need grip the most. This unit fits a wide range of Ford 9-inch rear ends with 31-spline axles, including popular models like the Ford Bronco, F-100, and Mustang from various years.

What sets the Grizzly Locker apart is its robust internal design, featuring a patented system that's built to withstand heavy abuse. The internal clutch teeth have a larger radius at the base, which Yukon Gear states offers up to 350% greater strength compared to other designs. This means they are much more resistant to breakage from sudden shock loads or catastrophic axle failures. The locker also uses 8620 internal gears for added durability and is assembled in the USA, reflecting a dedication to quality manufacturing. While it provides maximum traction, it still allows for the differential action needed to negotiate turns smoothly on pavement.

When installing a locker like this, it's important to note that it requires a full differential rebuild. This typically involves setting up ring and pinion gears, bearing preloads, and backlash, so it's a job best suited for experienced mechanics or a professional shop. Make sure to consult the manufacturer's installation instructions for detailed guidance on the process and any specific tools or setup procedures required.