Peterbilt Trucks For Sale

Start with the powertrain decision. Peterbilt highway tractors are commonly spec’d with the PACCAR MX-13 or Cummins X15. The MX-13 is lighter and optimizes fuel economy when paired with PACCAR TX-12 or TX-18 automated transmissions and PACCAR drive axles. The X15 delivers higher torque for heavy haul and wide service coverage. Medium-duty models typically run PACCAR PX-7 or PX-9 and Cummins B6.7 or L9 with Allison 2000 or 3000 series automatics. Match horsepower and torque to duty cycle, then align the rear axle ratio and transmission gearing so cruise RPM sits in the efficient band for your road speed and terrain.

For long-haul and regional applications, compare the Model 579 and 389. The 579 is the aero workhorse with EPIQ packages, 2.26 to 2.64 axle ratios for downspeeding, side skirts, roof and cab extenders, and safety tech like Bendix Wingman and lane departure. Sleeper choices range roughly 58 to 80 inches, including the UltraLoft for maximum storage and headroom. Automated transmissions reduce fatigue and improve consistency on rolling routes. The 389 is the classic long-hood with strong resale, show-quality trim options, and room to spec 13- or 18-speed gearboxes, heavy front axles, and higher torque ratings for specialized or heavy haul. Wheelbase, tank capacity, and fifth-wheel placement should be chosen to hit bridge law targets and maintain good steer-axle weights.

On the vocational side, the Model 567 is the lineup’s cornerstone with set-forward or set-back steer axles, high-RBM frame rails, double-frame inserts, PTO openings, and cooling packages for severe duty. Common suspensions include Peterbilt Low Air Leaf, Flex Air, Air Trac, plus Hendrickson Haulmaax or walking beam for off-road. Older 367 and 365 models remain prevalent as dumps, mixers, and loggers. Refuse fleets look to the 520 low-cab-forward with right-hand or dual drive. New medium-duty 536, 537, and 548 cover box, service, utility, and small dump builds with PTO-ready Allison transmissions and multiple wheelbase options. Natural gas and battery-electric variants like 220EV, 520EV, and 579EV fit regional or refuse routes with defined ranges and available charging or fuel infrastructure.

When comparing Peterbilt trucks for sale, study service records and diagnostic history. Look for documented DPF and SCR maintenance, regen frequency, EGR cooler or injector work, and any sensor replacements. On automated units, verify transmission software updates and clutch or fluid service intervals. Inspect frame rails for RBM rating, double-frame start-stop points, crossmember condition, and evidence of drilling from body changes. Check suspension bushings, brake lining thickness, and whether the truck has air disc brakes or a tire inflation system to reduce downtime. Confirm wheelbase, kingpin setting, axle ratios, and tire size align with your trailer fleet and gradeability needs. In cold regions, block heaters and arctic packages save headaches. In California, confirm CARB compliance and remaining emissions warranty coverage. Peterbilt’s aluminum cab construction, SmartLINQ remote diagnostics, and dealer network support help keep lifecycle costs predictable when the spec is matched to the job.