1987 Mack 600 R600, Tandem Axle Daycab Tractor, Diesel, , Manual Fifth Wheel, Steel Front Wheels, Steel Rear Wheels, 1987 R688ST TANDEM AXLE DAY CAB ENGINE E6 350 HP TRANS MACK 9 SP. WB 184 12K FRT. 38K MACK REARS ON CAMEL BACK RATIO 4.42 11R22.5 ALL STEEL WHEELS 2 HOSE WET SYSTEM A/C ENGINE BRAKE LOW MILES FOR 87 598,127 RUN AND DRIVES GREAT