Yukon YZLM35-

The Yukon Gear & Axle Zip Locker gives Jeep owners 100% control of their traction. With the flip of a switch you can convert from a standard open differential suitable for daily driving to fully locked when heading off-road. All without having to leave the driver seat. An on-board air system or compressor is required to operate, Yukon supplies all of the fittings and hardware needed to adapt to most air supplies. A forged case encloses alloy internal components for added strength and durability against the demanding conditions that Jeeps endure and all Yukon Lockers are assembled in the USA