Diamond T Trucks For Sale

Buyers considering Diamond T trucks for sale are usually choosing between highly collectible light-duty pickups and serious vintage heavy iron. The brand is known for hand-formed cabs, art deco grilles, and robust riveted frames that outlived many of their contemporaries. On the small end, the 201 pickup is prized for styling and rarity. On the heavy end, ex-military 6x6 wreckers and 980-981 prime movers are valued for historic significance and PTO-driven equipment. These trucks fit parade, display, and light-duty promotional use, and the best examples are sorted enough for regional cruises and show hauls.

Powertrains vary by era. Many civilian models left the factory with Hercules or Continental inline six gasoline engines paired to non-synchronized 4 or 5 speed main boxes and, often, a Brown-Lipe auxiliary for deep reduction or overdrive. Heavy vocational and military units used two-speed rears, PTO-driven front and rear winches, and in some cases full air brakes. Later commercial models and numerous restorations feature diesel conversions, commonly Cummins NH-series or period Buda diesels, improving torque, drivability, and fuel economy. Verify cold-start behavior, oil pressure at hot idle, and gearbox condition, and plan on double-clutching unless a synchronized swap has been done.

Chassis and running gear are straightforward but benefit from careful inspection. Frames are riveted ladder designs; check for scaling at spring hangers, crossmembers, and steering box mounts. Many trucks ride on 20 inch tube-type rims, including RH-5 degree split rims that are unsafe; budget for conversion to modern tubeless 22.5 rims and radials. Brake systems can be hydraulic, air-over-hydraulic, or full air. Count on system overhauls with new lines, diaphragms, wheel cylinders, S-cam bushings, and a verified functioning compressor on air-equipped units. Electrical systems were originally 6 volt on earlier models and later 12 volt; many owners convert to 12 volt with a modern alternator and updated harness. Cab rust typically concentrates in cab corners, cowl seams, and door bottoms. Glass is flat and widely reproduced, as are emblems and trim, which simplifies cosmetic restoration.

Ownership planning matters as much as nostalgia. GVWR on heavy Diamond T tandem 6x4 or 6x6 models can trigger CDL requirements depending on state law; antique or historic registration may limit commercial use and mileage. Insurance carriers often require a professional appraisal. Value depends on completeness, originality, and correctness of military or vocational gear, including Gar Wood winches, period PTOs, and data plates. For a driver-quality experience, look for upgraded brakes, safe wheels and tires, a reliable charging system, and gearing that matches your intended route speeds, since many originals with deep axle ratios were designed for 35 to 45 mph.