08 F450 with 4.88 rear end.It was made to work all the time so,it is detuned from the factory so you want tear it up. Pulls great just not fast down the road and milage sucks. It is a pleasure to drive,and at 60 to 65 it just cruises down the road,quite,smooth etc. Have had an Air Safe hitch and although expensive, it really has made a difference on washboards like I-10 to CA. Has been good TV for me. Main reason to carry fuel is no stops at $$$ places in CA or up in Flag.Plus can go out and camp,and come home w/o fuel stops.Easier and less stress comming home. Would love to have an MDT but need a P/U around the house.