Ford's new Ranger has a latest generation electronic Bosch ESP-based 4x4 system. This promo video, courtesy of Ford, gives a graphic demonstration of how effective it is. VansA2Z has tried it out and it works. The video also provides a good view of the non-leaf-sprung (unusual for a one tonne pick-up) rear suspension.
Ford Ranger 2012, ESP Hill descent, All-new, 4x4 pick-up