I just thought that I would add that...Porsche uses this on its Cayenne. It uses the abs unit to lock and unlock individual wheels to transfer the power through each diff to the wheel on the ground. It works really well and would be cool to use turning brake controls to make your own version. A welded rear diff and turning brake controls for the front in theory would be a fun experiment.
They also have a "extreme off road package" that has hydraulic decoupling sway bars to help articulation.
I wondered about that ABS unit if there was a way to use it backwards sortof