( http://www.TFLcar.com ) The 2012 Nissan Frontier 4X4 PRO4X is like driving a cross between a Jeep and a pick-up. It does all of the things that a normal pick-up will do but it also has the tools and technology that you need to go seriously off-road including Four wheel drive, a lockable differential and even hill descent control. In this Colorado off-road tech demo we put the  2012 Nissan Frontier 4X4 PRO4X to the test to see how all of those off-road technology features work when the going gets rough in the Rocky Mountains.