2024 Kenworth T680

Duty cycle profile, 525,815 miles on a late-model sleeper points to sustained highway service with a lot of seat time, the kind of usage that typically shows up first in driveline lash, steering wear, and cab touch points rather than in vocational fatigue. Powertrain details, engine, transmission, axle ratio, and any aftertreatment history are not provided, so application fit cannot be tied to gearing or shift strategy. ECM data is also not listed, so idle percentage, regen counts, derate history, and fault trends should be pulled before assigning any fuel economy or uptime expectations. Frame rails and running gear should be checked for straightness, corrosion at fastener points, and evidence of prior repairs, with close attention to fifth wheel top plate wear, slider rail condition, and air line routing. Steering and suspension should be evaluated for kingpin play, tie rod end looseness, air bag cracking, and shock leakage, plus a brake wear read on linings, drums or rotors, and chamber function. Cab and sleeper condition should be judged by seat base looseness, pedal and floor wear, dash switch function, HVAC performance, and air leaks at doors and sleeper seals. Electrical and air system integrity checks should include battery and cable condition, alternator output, air build time, compressor cycling, and any audible leaks at the dash, gladhand lines, and suspension valves.