I know this is an old thread, but I wanted to add my 2 cents. I traded in my 2005 Ram 2500 Laramie w/Cummins for a 2016 Ram 1500 Laramie EcoDiesel. I opted for the 3.92 gearing (I think it was <$100 option) and I'm glad I did it. I don't haul and tow often (I tow a travel trailer 2-3 times a...