I think the weight savings is from the Cummins and the 300lb exhaust system & def fluid. Not sure how much weight is saved with the different transmission.Wow impressive weight savings by just getting rid of the Aisin and Cummins. This has a 3.36 ratio and the QX80 was a 2.93. I would guess towing to be 10k-10.5k
Hope they don't lower the GVWR of the gas. Too bad the tank is still only 26 gal for the gas.