1988 Mack RD690S; Engine: E-6 350 4v; Engine Make: MACK; Engine HP: 350; Transmission: Manual; Diesel; Front Axle: 20000; Rear Axle: 46000; GVWR: 66000; WB: 207; 10 Spd; Original Double Frame from Manufacture. Engine was Rebuilt a year ago. All Tires, but one, are New, approximately 95%. It also has New Differentials at 4.42 Ratio, New Radiator, and New Fan. Its comes with Jake Brake, and Power Sterling.; Wheels: Steel; Tires @: Like New Condition; Overall Condition: Good; A/C: Good; Heater: Good; 4 WD: Yes; Batteries: Good; Tire Size: 11R22.5; # of Rear Axles: 3; Dump Box: Steel; Odometer Reads: 190765.