My 04 has 146,000 trouble free miles but the new truck bug has bit. I'm wondering what would be better to get for my application. The bed is a non issue. It will be a multi-purpose farm truck loaded with tools, compresor, fuel tank, well if you can think of needing it on farm I've probally got it on the truck (the 04 weighs 12,800 with everything on it). I'm going to be towing my dozer, excavtor, etc... around the farm to and from different fields and such. The dozer is the heaviest weighing 18,000lbs (Yes I know I should get a 4500 or 5500 but I'm not so it doesn't matter). Most of my tow trips are 20 miles or less. The truck will be the service truck in the field. But to be honest most days it will just be general transportation around the farm. The truck i buy will be an auto so I'd like input on whitch transmission is better suited. I'd also like input on thoughts if going with the urea would be better or not. Tractors and stuff will be using the def so getting it will be a non issue just wonder if it might be better in the field?