2025 Kenworth T680

Category, Trucks. Mileage profile, 238,490 miles points to a highway duty cycle with enough use to show real wear patterns without being end of life, a good range for checking maintenance consistency and early-life component seepage. Identification, serial 1XKYDP9XXSJ177849 and stock 0634522 provide traceability for service history, warranty status, and campaign verification. Powertrain details, engine family, transmission model, axle ratio, and any engine brake spec are not provided, so application fit cannot be tied to gearing or shift strategy from the listing alone. ECM information is also not listed, so any evaluation of calibration history, fault trends, idle hours, or aftertreatment performance would require a scan report and parameter printout. Cab structure, sleeper and conventional layout favor linehaul and multi-day runs, with inspection focus on seat base play, pedal wear, steering wheel polish, bunk hardware, HVAC output, and dash switchgear function. Frame rails and crossmembers should be checked for straightness, corrosion at fastener points, and evidence of prior upfit holes, with attention to fifth wheel top plate wear, slider operation, air line chafe points, and driveline carrier bearing play. Cooling stack, charge-air plumbing, and exhaust joints deserve a close look for rub marks and soot tracking, plus a cold-start check for blow-by, crankcase pressure, and any coolant residue around the EGR and thermostat housings.