Check the photo, "Lew's Rig" in the photo section. An '03 1T Quad Cab dually HO Cummins w/6spd mnl trans and 3.73 rear. The whole rig grosses at about 22,500 averages near 14mpg towing and has been over several high Colorado passes. It is the best towing rig that I have had yet (and I trade often). This truck is 'sweet'! IMHO of course. Lew