Yukon Gear Grizzly Locker For Dana 60 / 4.10 & Down / 40 Spline

This is the Yukon Gear Grizzly Locker, a serious mechanical locking differential built for Dana 60 axles with 40-spline shafts and a 4.10 gear ratio or numerically lower. If you're pushing your vehicle hard off-road, whether it's rock crawling, serious trail running, or even drag racing, this locker is designed to give you maximum traction when you need it most. It ensures 100% of the engine's power goes to both wheels, but it also cleverly disengages to allow for smoother turning on pavement.

What sets the Grizzly Locker apart is its robust internal design, featuring patented innovations that make it incredibly tough. 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 it's better equipped to handle the shock loads and stresses of extreme off-road driving and racing. The casing and gears are also built for hardcore use, and the unit utilizes 8620 internals for added durability. This locker fits a wide range of vehicles, including many classic Chevrolet C/K series trucks and older Dodge trucks and vans, making it a popular choice for serious off-road builds.

When you're installing a locker like this, it's a good idea to have all your differential rebuild parts on hand, such as bearings, seals, and gear marking compound, as you'll be opening up the axle housing. Refer to the manufacturer's installation instructions for the specific procedures and any special tools required for your application.