Having newly installed ARBs but not knowing about disconnecting, I nearly cashed it in right there in my XJ back in '04. I approached the step perpendicular which ends up placing the left (down hill) tire first. Right rear rose 5 feet, teeter tottering just about to roll over. I locked the axles, backed up, then reapproached the step with the uphill (right tire) stepping off first. What's weird is the correct approach to that step tips your passenger outward a little toward the cliff as you then place the left (down hill) tire off the step, keeping front level (right to left) in relation to the downhill route as you're also turning into the down hill camber of the trail. If you do this like I first did it and the roll momentum is enough to go over and off the trail, you won't stop until the ledge 150 feet below catches you just above the telephone poles. The approach to the Z turn is much steeper than it seems when ascending. I've done the Rim 4 times after that, descending once at night. Disconnect when you arrive at Moab; reconnect when you leave.