I love this truck. It's my second cummins with a stick. I regularly pull a 20,000 lbs. gooseneck trailer. This thing is stock and I just put it in the top slot (6th gear) and it'll go up any hill in Iowa, Missouri, Minnesota and Wisconsin. The best part is it still gets like 16.5 mpg! I can get 24.7mpg empty! Beat that Ford or Chevy! The leather is awesome, everything in the cab is roomy and accessible. Definite best buy, I'd recommend to anyone. The duals really don't hinder off-road ability as long as you have some All Terrain tires. I can go through just as much as any of my huntin' buddies with it. The limited slip rear end helps. I am a diesel mechanic and love how easy it's to work on.