Model 220 cabover has a new electronic braking system and an redesigned cab.
Class 6 and 7 Kenworth cabover trucks have been upgraded with front air disc brakes, electronic braking module, and a new dash and gauge cluster.
Ford Commercial Truck is extensively redesigning its F-650 and F-750 medium-duty trucks
Navistar International WorkStar Hybrid 4x4 is designed for medium-heavy on/off-road use.
Chrysler barged into the medium-duty class with the 2008 Dodge Ram 4500 and 5500 Chassis Cabs. They are aggressively specced with gross vehicle weight ratings of 16,500 and 19,500 pounds, respectively, and standard 6.7-liter Cummins turbo diesel engines. There's a choice of six-speed automatic or manual transmissions.