2019 Kenworth T880

Duty cycle suggests highway miles with steady heat cycles and long service intervals, so inspection priority is blowby level, coolant condition, aftertreatment history, and driveline lash. Mileage at 748,074 puts this into the wear band where bushings, wheel ends, air system leaks, and electrical rub points start showing up even when the truck has been maintained. Powertrain details are not provided, so verification should start at the data plate and ECM pull, then match engine family, trans model, and axle ratio to the intended work. ECM hours, idle percentage, regen count, fault history, and last programmed parameters are the quickest way to separate a true road unit from a high-idle vocational truck wearing highway miles. Frame rails and crossmembers need a straightness check around suspension hangers, fifth wheel area, and any added brackets, looking for elongated holes, cracked paint lines, and corrosion at fastener stacks. Fifth wheel jaws, top plate, and slider rails should be checked for ramping, loose stops, and air cylinder leaks if air slide is present. Cab interior wear tells the real story at this mileage, seat base play, pedal pad wear, steering shaft slop, HVAC blend door operation, and sleeper seals for dust trails or water marks. Air system and brakes deserve a full walkdown, air dryer purge behavior, compressor build time, chamber pushrod travel, and ABS wiring at the axles for chafe and broken loom.