Yukon Zip and Grizzly
The Grizzly (pictured) and Zip lockers from Yukon do the same thing, but they do it in different ways. The Zip is an air-actuated locker for on-demand traction that acts as an open differential in the unlocked position, and features a forged case and 4320 steel internals for big muscle. The Grizzly is an automatic locking differential featuring solid 8620 alloy steel internals, a design that is said to eliminate common failure points, and a roaring behemoth of a bear on the box.
Fitment: Options for many common Jeep factory axles and popular axle swaps.
Information: Yukon Gear & Axle, 888/905-5044, yukongear.com