1986 MACK R686ST, Heavy Duty Trucks - Day Cab Trucks, 1986 MACK R686ST TRUCK TRACTOR VN:1M2N179Y3GA003415 poweredby Mack E6-300 diesel engine, equipped with Maxitorque 6 speed low holetransmission, power steering, 2 line wet system, ALFAB aluminumheadache rack, 44,000lb rears, camelback spring suspension, doubleframe, 11R24.5 tires, tandem axle.