357, Heavy Duty Trucks - Conventional Trucks w/ Sleeper, Caterpillar C15, 18 Spd, Impossible to find, pre-emission 6x6. We sold these trucks brand new and the previous owners are top notch. Give us a call and let's talk specs and pricing. Full factory build sheets available. Automatic Tire Inflation System Wet-Kit 10 3/4 frame rails Full steel liner 8" guppy belly outsert Marmon MT22H Front Drive Axle D46-170 Rear Drive Axle Cotta TR2205-14 Transfer Case Dual Lockers 60" 46k Air Trac Suspension C15 475/1650 CAT Compression Brake Dual Air Cleaners Dual Exhaust Dual 120 Gallon Tanks Power Door Locks Power Windows Power Mirrors Thermal Insulation Package Adjustable Steering Column, 475 Horse Power, Air Trac Suspension, Aluminum/Steel Wheels, 220 Wheel Base, , Tandem Axle, Ratio, 36 Flat Top Sleeper