Cummins ISB 3.9 L Diesel 170 hp Engine, Allison 1000 Automatic Transmission, 4700 lb Front Axle, 5900 lb Rears, Dana 70 Series Drive Axles, 4.10:1 Axle Ratio, 10000 lb GVWR, 245/70R19.5, Spring Suspension, 178 in Wheelbase, Utilimaster 18 ft x 96 in Wide x 86 in High Body, Curbside Door