2007 Dodge Ram 3500 SLT Package Long Box DRW Diesel $14,990

Vehicle overview When it comes to towing and hauling, nothing can take on more work than a full-size, heavy-duty pickup truck. Armed with stiffened suspensions, rugged frames and the most powerful engines available, these trucks are the preferred choice for commercial users and those with big jobs to undertake. Only three automakers offer heavies, and the 2007 Dodge Ram 2500 and 3500 serve as DaimlerChrysler's offerings. The difference between the two mostly relates to capacity -- the 3500 can take on a heavier payload thanks to its stiffer suspension and optional dual-wheel rear axle. The beefier 3500 might seem like the obvious bigger-is-better choice, but unless you need max capacity, the 2500's more friendly ride quality when unloaded might be beneficial. The current Ram 2500 design has been around since 2003. A significant powertrain upgrade occurs this year. A 6.7-liter Cummins turbodiesel inline six-cylinder engine (late availability) replaces the previous 5.9-liter Cummins. It produces 350 hp at 3,000 rpm and 650 lb-ft of torque at 1,500 rpm. Dodge says it's quieter and less polluting than the 5.9 and available with an industry-first exhaust brake. For reference, the 5.9, which will likely be found on some early-build 2007 2500s, makes 325 hp and 610 lb-ft of torque. The new 6.7 Cummins will come with an all-new six-speed automatic that replaces the previous four-speed automatic. As you would expect, two-wheel- and four-wheel-drive configurations are offered. The 4WD system is manually or electronically controlled, depending on trim level. Four-wheel-drive trucks have a solid front axle, while two-wheel-drive Rams get an independent front suspension. Additionally, the 2WD trucks have a rack-and-pinion steering system, while 4WD trucks utilize a recirculating-ball setup.