sorry for the late reply, forgot i posted in here.
As for what broke, first it was hard parts. internally, there is a ring that moves back and forth depending on if it's activated or not and locks the spider gear. that broke in half and eventually bound up and wore out the dogs on both the ring and the spider gear. after that was all fixed, the electromagnet burned out shortly after.
i do beat the piss out of it, but i've had lunchbox lockers last longer in my old d30. mostly rock crawling, i do break a lot of things. D44's front and rear, on small 35's. In socal, so wheeling shouldnt be a ton different than CO. Eaton will not sell you individual parts, they sell "kits". so if you break a $3 pin, you have to buy a $270 hard parts rebuild kit. If you burn out the electromagnet, you have to buy a $170 stator kit. If you break both like me, you get to buy both. They do not sell replacement parts direct, so you have to go through a dealer to buy replacement parts.
obviously it's a bit late for the OP as he already ordered, but since you guys asked...