Detroit DD13 6 Cylinder 12.8 L, 435 HP, Jake, Detroit DT12-OB-1550 HD, 12 speed Automated Transmission, 12000# Front Axle, 40000# Rears, Meritor MT-40-14X Drive Axles, 3.25 Ratio, 52000lb GVWR, Air Ride Cab, 11R22.5, Airliner Air Ride Suspension, 178" Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tank, Aluminum Wheels, Tilt, A/C, Cruise, and Stereo. Rust Free California Truck.