Machine description: Cat 6 Cylinder Diesel Engine, Eaton Fuller RTX11798LL 8LL Manual Transmission, Differential Lock, 18144 kg Front Axle, 19958 kg Rears, 6.17:1 Axle Ratio, 38102 kg GVWR, 445/65R22.5 Front Tires, 11R22.... more info about the 1989 Kenworth C550.