Built for 2.5 ton Rockwell axle setups, this 16-spline Grizzly Locker sending 100% of available torque to both axle shafts under load. Its a major upgrade over open differentials, giving you the traction needed to stay moving in the most aggressive terrain- whether you're running a rock bouncer, mud truck, or hardcore trail rig.

The larger internal engagement teeth and improved gear geometry help it handle shock loads from big tires, high horsepower, and harsh terrain. It automatically unlocks during turns for improved maneuverability while maintaining full traction when power is applied.

Includes:

• (1) Locking differential (16-spline)
• Fully assembled internal gear set
• Installation-ready unit for Rockwell 2.5 ton axles

Specifications

• Fits 2.5 ton Rockwell axle
• 16-spline axle compatibility
• Installs into standard open carrier case
• Automatic mechanical locking differential
• 100% torque transfer under load
• Larger internal teeth to resist shock load and breakage
• Does not use factory thrust washers

Fitment

• 2.5 ton Rockwell axles
• Requires 16-spline axle shafts
• Designed for use with standard open carrier case

Factory thrust washers must be removed prior to installation.Failure to remove thrust washers can cause improper operation or damage.

Tech Insight

What does a Grizzly Locker do in a Rockwell axle?

A Grizzly Locker automatically locks both axle shafts together under power, allowing both tires to receive equal torque. This dramatically improves traction compared to an open differential, especially in rock crawling, mud racing, hill climbing, and other extreme off-road conditions where one tire may lose grip.

Will this locker fit all Rockwell 2.5 ton axles?

This Grizzly Locker is designed specifically for 2.5 ton Rockwell axles using 16-spline axle shafts. Before ordering, verify your axle spline count and carrier configuration to ensure compatibility.

How is a Grizzly Locker different from a spool?

A spool permanently locks both axle shafts together at all times. A Grizzly Locker automatically unlocks during turns and re-engages under power, making steering easier while still providing maximum traction when needed. This makes it a popular choice for trail rigs, mud trucks, and off-road vehicles that benefit from improved maneuverability.

Why must the factory thrust washers be removed during installation?

The Grizzly Locker is engineered to operate without the factory Rockwell thrust washers. Leaving the thrust washers installed can create improper internal clearances, leading to poor locker performance, excessive wear, or component damage. Always follow the manufacturer's installation instructions and verify clearances during assembly.

Is a Grizzly Locker strong enough for big tires and high horsepower?

Yes. The Yukon Grizzly Locker is built with large internal engagement teeth and improved gear geometry designed to handle the shock loads created by large tires, high-horsepower engines, aggressive terrain, and heavy vehicles. It is commonly used in rock bouncers, mud trucks, competition rigs, and hardcore trail builds where drivetrain durability is critical.