I have a Detroit locker to fit Dana 44 axles. Front or rear any brand as long as it's a 30 spline axle. It is part number 187SL16D. This was installed, driven around the parking lot and taken back out as the gears were not correct for 35" tires. Cost me a touch over $600CAD a year ago. Need it gone. $420CAD (397USD) + Shipping and it's yours. That's 1/3 off what I paid for it. Still have the manufacturers documentation that came with it.