Cat 3306B 6 Cylinder 10.5 L Diesel Engine, 1990 US EPA Label, CARB Compliant, 8484.0 Engine hrs, Eaton Fuller RTX11708LL Manual Transmission, 16000 lb Front Axle, 40000 lb Rears, Spicer DS402 Drive Axles, 4.28:1 Axle Ratio, 56000 lb GVWR, 425/65R22.5 Front Tires, 11R22.5 Rear Tires, Hendrickson Rubber over Walking Beam Suspension, 195 in Wheelbase, London Mixer Unit