2006 3500 Dodge Laramie four door 4 wheel drive single wheel rear, 3:73 gears, automatic, stock Cummins. Trailer is a 24 ft 10,000 lb. GVW Pace Shadow,trailer weighs around 8600 lbs when loaded hook to the truck going to the races, truck weighs around 8000 lbs hook to the trailer, 7500 lbs unhooked Truck and trailer stop nice, tows great, good power and econmy, 14 MPG to 9.5 MPG at or above 70 MPH 6000ft above sea level to 180 ft above sea level so far