2021 Mack GR64FT

Category, Trucks. Duty cycle shows mid-mileage daycab use, the 179,817 miles points to regional, local, or dedicated route work rather than a long-haul sleeper life. Daycab layout favors frequent stops, yard moves, and drop and hook operations where cab access and visibility matter more than bunk space. Powertrain details are not provided, so engine, transmission, and axle ratio suitability cannot be tied to a specific application. Serial number 1M1GR4GY3MM022371 and stock B3634L give traceability for service history, recalls, and build sheet verification, ECM hours and idle percentage should be pulled to confirm how the miles were accumulated. Frame rails should be checked for straightness, corrosion at fastener points, and any added holes from prior equipment, especially around suspension hangers and the fifth wheel area. Fifth wheel condition comes down to plate wear, jaw operation, and slider rail play if equipped, look for dry locking surfaces and uneven grease patterns that suggest high coupling cycles. Cab upholstery and controls should be assessed for wear consistent with the odometer, pedal pad wear, seat base looseness, and dash switch function often tell the real story on a daycab. Tires, brakes, and steer axle components need a close look for uneven wear, cupping, and kingpin play, those items usually reveal alignment, bushing condition, and curb contact history.