In the late 1980s, Dodge Truck sales made a dramatic comeback when Chrysler partnered with Cummins, offering a 5.9L inline six-cylinder, 12-valve Cummins engine option. I test drove one of the earliest models with a three-speed A727 Torqueflite transmission. What a difference that powertrain made in contrast to gasoline engines of the era! Since that time, the 12- and 24-valve Cummins ISB and 6.7L options have made Dodge and Ram trucks a major contender at hauling and performance. The 4WD Mechanix Magazine fleet vehicles include a 2005 Ram 3500 4WD with 5.9L Cummins 24-valve engine, featured i