Used 1986 Commercial Trucks For Sale

Used 1986 trucks appeal to buyers who value simple, mechanical drivetrains and serviceable components. Expect pre-emissions engines with mechanical fuel systems, full drum brakes, and analog wiring that is easier to trace than later multiplexed harnesses. The deciding factors are structural condition and tare weight, since corrosion, prior repairs, and spec choices from the era can swing durability and payload by a wide margin.

Powertrain choices commonly include Cummins NTC Big Cam, Caterpillar 3406B, Detroit Diesel 6V92 or 8V92 for heavy duty, and International DT466 or Caterpillar 3208 for medium duty. Fuller Roadranger 9, 10, or 13 speed boxes dominate, often paired with Rockwell or Eaton rears in ratios from mid 3s to low 4s depending on tire size and intended cruise speed. Verify oil pressure hot, blow-by level at idle and under load, governor response, and documentation for any in-frame or out-of-frame overhauls. Check differential lash and carrier noise, input and output seal condition, and driveline angles following any wheelbase changes. Highway cabs with sleepers add weight, day cabs save several hundred pounds, aluminum wheels and fuel tanks help further reduce tare.

Chassis and body condition set the line between a workable classic and a project. Inspect single versus double frame rails for scaling between liners, look for flange pitting near spring hangers and torque rod brackets, and confirm crossmember integrity around suspension mounts and fifth wheel pedestals. For box and reefer bodies, floor strength depends on crossmember spacing and deck material; aluminum or hardwood plank floors with 12 inch on center crossmembers carry palletized freight better than wider spacing. Look for scuff liners that protect posts, avoid bowed sidewalls, and confirm door header and sill repairs were done with proper rivets and sealants.

Thermal integrity on 1986 reefer bodies is the biggest variable, as polyurethane insulation can shrink over time and door seals harden. Expect higher fuel burn and slower pull-down if the box has foam voids or poor gaskets; pressure test the body if possible, check corner caps and roof seams for leaks, and evaluate reefer unit serviceability if an original Thermo King or Carrier is still fitted. On dumps, evaluate floor plate thickness and liner wear, hinge pin play, hoist cylinder drift, and subframe rust. Across all models, verify brake foundation components and airlines, confirm slack adjuster type and free stroke, and budget for bushing and wiring refresh. A clean frame, tight driveline, solid floors, and manageable tare weight indicate the best value in a 1986 work truck.