Used 2018 Kenworth Trucks For Sale
Browse used 2018 Kenworth trucks, including T680 and vocational models, with specs on engines, sleepers, wheelbases, axles, and applications.
Learn more
Have used 2018 kenworth truck to sell? List it here to reach thousands of buyers.
About Used 2018 Kenworth Trucks
The first decision is usually application and cab configuration. A 2018 Kenworth T680 sleeper is commonly spec'd for regional or long-haul freight, often with 72-inch or 76-inch sleepers, tandem axles, air ride suspension, and horsepower in the 400 to 500 range from PACCAR MX-13, Cummins X15, or late ISX platforms. Daycab versions are more common in dedicated freight, short-haul, and port work where wheelbase, turning radius, and weight matter more than onboard living space. Medium-duty 2018 Kenworth trucks are often found with PX-7 or PX-9 engines, automatic transmissions, and bodies such as dry van, reefer, rollback, dump, or service configurations. If the listing is a vocational chassis, pay attention to PTO setup, frame rail ratings, and front axle capacity because those specs determine upfit compatibility.
Powertrain spec matters as much as the badge. On highway tractors, common transmission choices include Eaton manual and automated manual units, along with some Allison automatics in medium-duty or specialty use. Rear axle ratios like 2.47, 2.64, or 3.25 can tell you a lot about intended service. A tall ratio generally favors fuel economy at highway speed, while a shorter ratio supports heavier starts, city work, or vocational use. Buyers should also compare emissions history, engine brake performance, maintenance records, and mileage against the original duty cycle. A 2018 Kenworth with collision mitigation, disc brakes, air slide fifth wheel, dual fuel tanks, and a well-matched wheelbase can be a strong value if the truck's prior application lines up with the work you need it to do.
Cab condition and chassis details still separate a good used truck from an expensive project. Look closely at suspension type, kingpin setting, tire wear pattern, frame condition, fairings, bunk heater or APU equipment, and signs of corrosion around battery boxes, crossmembers, and cab mounts. On straight trucks, inspect the body just as carefully as the chassis, including floor condition, scuff liners, E-track, roll-up doors, and liftgate or reefer components if equipped. Kenworth trucks are known for driver comfort, serviceability, and resale strength, but the best 2018 spec is the one that matches your route length, payload, trailer type, and shop capabilities.
Frequently Asked Questions
What are the most common 2018 Kenworth truck models on the used market?
The most common used 2018 Kenworth trucks are usually T680 highway tractors, T880 vocational trucks, W900 conventionals, and medium-duty models such as the T270 and T370. The T680 is especially common in fleet and long-haul service, while the T880 is more likely to appear in dump, mixer, heavy-haul, or construction applications. Medium-duty Kenworths are often found as box trucks, reefer trucks, flatbeds, and service bodies.
Which engines are common in a used 2018 Kenworth truck?
Common engines in 2018 Kenworth trucks include the PACCAR MX-13, Cummins X15, Cummins ISX15 in some configurations, and PX-series engines in medium-duty models. The right engine depends on use case. MX-13 and X15 engines are common in Class 8 road tractors, typically in the 400 to 500 horsepower range, while PX-7 and PX-9 engines are more common in lighter straight truck and vocational applications.
Is a 2018 Kenworth T680 a good choice for long-haul freight?
A 2018 Kenworth T680 is a common long-haul choice because it was designed around fuel efficiency, driver comfort, and fleet serviceability. Many are equipped with high-roof sleepers, aerodynamic fairings, tandem rear axles, and automated manual transmissions suited for over-the-road operation. Buyers should still verify sleeper size, axle ratio, engine make, maintenance history, and emissions performance before deciding if a specific spec fits their lanes.
What should I inspect first on a used 2018 Kenworth truck?
Start with the engine and emissions system, then move to the transmission, suspension, frame, and cab condition. Service records, fault codes, idle hours, tire wear, and evidence of previous body or frame repair can tell you more than cosmetic appearance. On a sleeper tractor, check APU or bunk heater operation, fairings, and fifth wheel wear. On a straight truck, inspect the body floor, scuff liners, roof, rear door hardware, and any hydraulic or refrigeration equipment.
How do I choose between a 2018 Kenworth daycab and sleeper?
The choice comes down to route length, payload needs, and operating model. A daycab usually offers lower weight, a shorter wheelbase, and better maneuverability for local, dedicated, or terminal-based work. A sleeper is better suited to regional and over-the-road lanes where drivers need onboard storage and rest accommodations. Buyers should also factor in fuel capacity, wheelbase, fifth wheel placement, and the trailer lengths they plan to pull.