Calsdad, Yes I know you were trying to find that out, that's why I said what I said. I should have been more clear, but was at work. In all my research in even ordering the truck, it just came down to the gearing nothing else. When you request the 4.10 on order nothing else changes in the GM powertrain just the gears. Which gives more mechanical leverage and vola! higher rating.. I think this year GM went standard with the 4.10 which I would have on my next gas 3/4 ton truck. I do like the fact that Ford offers the 4.30 option on the gas 6.2.
