2017 Mack GU813. 505HP Mack MP8. 18 Speed Transmission. 46,000LB Full Locking Rears. 16,500LB Steer Axle. Only 398,000 Original Miles. Hendrickson Air Ride Suspension. Steer Axle Disc Brakes. Dual Steering Gearboxes. Loaded Interior. Gauge Package. Air Slide Fifth Wheel. 11R22.5 Drives. 385/65R22.5 Steers. Aluminum Rear Quarter Fenders. Engine Brake. Cruise Control. Clean Mack GU813