I need lockers. But my 40 is also my DD, and my highway ATV tow rig. It sees a lot of road miles in between the trail miles, but the trail miles it sees are muddy and slippery, and open diffs front and rear are no longer cutting it. I like the fact that ARB's are selectable, but some (Junk) don't like them and consider them crap. I have a hard time seeing me breaking an ARB. What I can't find are installation prices and how much the thing costs. I think its around $650? My rear R&P needs replacing anyway, so someones gonna be in the rear sometime soon anyway. I'm thinking that detroit wouldn't be good since mine sees a good many road miles, and I can't sit around and wait for that electric locker/LSD to come around the Cruisers, theres no tellin how long it will take. What I'm lookin for are personal experience with different lockers, cost and how much of a PITA they were to install/get installed.