DW & I bought an 08 Dodge 5500 in Phoenix, AZ this past Feb. It has the hauler Elite Bed made by Utility Body Werks in Elkhart, IN. We just returned home from a trip to Alaska, which took us 4 months and 12,500 miles to complete. The CTD is 305 HP and we have a 4:88 rear end with the 6 speed automatic and a Kelderman Air Ride suspension. The truck was great, handled excellent on the rough dirt roads but our MS 5th Wheel trailer suffered some damage from the vibrations. We pulled a variety of grades from 6% to 9% and the truck handled our 16,300 lb trailer just fine, and the exhaust brake made the long downhill grades much easier on the brakes.