Of course, we had to take a spin in the dirt. The 4WD shifter is a turn knob located on the dash, right of the steering wheel. There are 2WD, 4WD Hi, and 4WD Lo, transfer case engagement options. With the 2.69:1 low range in the Magna T-case and the new diesel exhaust brake system, the truck had excellent descent control and moved extremely slowly down even steep grades without any use of the brake pedal. The ride in the dirt could be improved. Though it has an independent front suspension, the shocks don’t seem adequate for the stiffness of the torsion bars or the rigors of off-road.