2024 Kenworth T680

Duty cycle shows up in the odometer, 530,405 miles on a late-model conventional sleeper points to sustained highway use and long intervals between stops. Sleeper layout supports over-the-road scheduling, and the used condition calls for a close look at consumables that wear fast in high-mile service, tires, brakes, and steer axle components. Powertrain details are not provided, so verification matters, engine family, transmission model, and rear ratio should be confirmed off the door tag and build sheet before matching it to a lane. ECM information is not listed, so any evaluation should include a scan for active and inactive fault history, aftertreatment performance data, and evidence of recent regens or derates. Frame rails deserve a straight-on sight line for waviness, drilled holes, and corrosion at suspension hangers and crossmember joints, plus a check for oil misting around the rear main area and driveline. Fifth wheel and sliding rails should be inspected for jaw wear, plate grooving, and free movement, and air system health should be judged by build time, governor cut-in and cut-out behavior, and audible leaks at gladhands and cab air lines. Cab upholstery and controls are quick tells on how it was treated, look for seat bolster collapse, pedal pad wear, and broken switchgear, then confirm HVAC output and bunk functions. Service records tied to serial number 1XKYDP9X3RJ333952 and stock 0631525 help validate oil change cadence, DPF service intervals, and any recent work on cooling system, EGR, or turbo plumbing.