2021 Kenworth T680

Duty cycle shows up in the odometer, 471,895 miles points to highway and regional linehaul use where cooling, aftertreatment health, and front-end wear tell the real story. Serial number 1XKYDP9X2MJ396131, stock number 0634536. Powertrain details are not listed, so verification matters, engine family, transmission model, and rear ratio should be confirmed from the door tag, build sheet, and ECM report before assigning an application. ECM data is not provided here, so an idle percentage, regen history, fault log, and total fuel used pull is a priority to separate steady-state miles from high idle time. Frame rails and crossmembers should be checked for straightness, corrosion at fastener points, and any evidence of prior repairs around suspension hangers and steering gear. Fifth wheel condition comes down to jaw wear, top plate grooving, and slider rail play, all common wear points at this mileage. Cab interior and sleeper utility depend on seat base play, pedal wear, HVAC performance, and dash switchgear function, with special attention to air leaks, window regulator operation, and bunk HVAC if equipped. Tires, brakes, and wheel ends should be evaluated as a set, tread match, rotor or drum condition, slack adjuster travel, and hub seal seepage will show whether maintenance has been consistent.