03. To find out what makes the new Offrotec differential tick...er...lock, we snuck ours into the back room of Off Road Unlimited in Burbank, California, for a top-secret locker autopsy. When the technicians at ORU disassembled the Offrotec locker we were impressed by the precision machining and how much beefier this differential is than any other Dana 60 unit we've ever seen. The guys at ORU figured out that this differential locks by sliding eight steel pins (A) in and out of receiving holes (B) on one of the differential side gears. This design means that you'd have to shear all eight pins or break all eight high-strength bolts (C) that hold the two differential halves together in order to break the locker.