Ram is known for offering a Cummins diesel 6-cylinder engine in its trucks, but it's not available in the Power Wagon. The diesel is simply too long to allow room for the big winch up front and it's monstrously heavy – 1,150 pounds dry – not a trait you want for an off-roader. The Power Wagon also uses a decidedly old-school, simple and effective, manually-shifted 2-speed transfer case to select two-wheel-drive or four-wheel-drive with high or low range. Locking front and rear differentials, which are essential for the sort of serious off-roading the Power Wagon promises, are incompatible with the oil burner's 4WD system.