I bought the new 2018 Cascadia at the end of July. I absolutely love it! It has the dd15 and dt12 transmission. Full torque at 950 RPMs. I'm grossing 90000 pounds or more per load and averaging 7.1 miles per gallon with 24k on the odometer. The first 5k miles I pulled a poultry trailer and the rest of the were with a triple axle hopper bottom.