Yukon Gear Grizzly Locker For Model 35 w/ 27 Spline Axles / 3.54 Up

This Yukon Gear Grizzly Locker is a mechanical locking differential designed for the AMC Model 35 axle with 27 spline axles and a gear ratio of 3.54 or numerically lower. It's built for serious off-road use, including rock crawling, trail running, and even drag racing. When engaged, it locks both rear wheels together, ensuring they receive 100% of the engine's power, which is crucial for maintaining traction in challenging conditions. Despite its locking action, it's designed to disengage while turning, making it more manageable on the street than some other locker types.

What you get in this package is the Grizzly Locker itself, featuring a patented internal design that Yukon Gear says is tougher than the competition. The casing and gears are built for hardcore use, and the advanced gear tooth design includes inner clutch teeth with a larger radius at the base. This design offers significantly greater strength compared to back-cut designs and helps resist breakage from shock-loading or catastrophic axle failure. The internals are made from 8620 steel for added strength, and the unit is assembled in the USA. This locker fits a wide range of vehicles, including models like the Jeep Cherokee (1984-2001), Jeep Wrangler (1987-1995, 1997-2006), and American Motors Concord (1978-1983), among others.

Installing a locker like this is a significant drivetrain modification. It's important to ensure you have the correct gear ratio (3.54 and up) and spline count (27) for your specific axle. While the locker itself allows for disengagement during turns, expect a noticeable difference in steering feel and tire wear on pavement compared to an open or limited-slip differential. For optimal performance and longevity, it's recommended to follow the manufacturer's installation instructions carefully, which may include specific bearing part numbers like the LM102949 mentioned in some fitment notes.