Drivetrains: Carryover 6.4-liter Hemi V-8 (410-horsepower, 429 pounds-feet of torque) paired to a new eight-speed automatic transmission or all-new turbo-diesel 6.7-liter inline-six-cylinder Cummins (370 or 400 hp, 850 or 1,000 pounds-feet of torque) with a pair of new six-speed automatic transmissions; rear- or four-wheel drive Following close on the heels of the successful launch of the 2019 Ram 1500 light-duty pickup truck, the new 2019 Ram 2500 and 3500 revealed today at the 2019 North American International Auto Show in Detroit offer similar (but very different) structural and quality upgrades to the frame, chassis, cabs and interior. Because there is so much difference between the heavy-duty 2500 and 3500 models, especially the dual-rear-wheel models, this story focuses on the changes to the one-ton model. If you want to read more about the changes to the three-quarter ton and upgraded 2019 Ram 2500 Power Wagon, click here. The 2019 Ram 3500 will continue to be offered in several distinct trim levels: Tradesman, Big Horn/Lone Star, Laramie, Laramie Longhorn and Limited. The outside of the Ram 3500, as you would expect, closely follows the 2500 and to a certain extent the s...