1942 Diamond T
968A 4-ton  6x6 Truck

The Diamond T 4-ton 6×6 truck was a heavy tactical truck built for the United States Army during World War II. Its G-number was G-509. Cargo models were designed to transport a 4-ton (3,600 kg) load over all terrain in all weather. In addition to the cargo truck, there were also wrecker, dump, pontoon and other specialty models.

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This truck, built in August of 1944 by Diamond T Motor Car Company in Chicago Illinois. It was the principle 4 ton truck of the US Army during WWII. Considered the "Cadillac of American Trucks," it was a tough, handsome brute found in every theater of WWII. Its rugged design and its total reliability were much appreciated by the American soldiers. This particular truck was surplused by the Norwegian Army in the mid-1990's and was then acquired by a Belgian collector. From Belgium, it found its way to England where a British collector restored it. Apparently he found it too difficult to maneuver on the narrow English country lanes and so it finally came home to the United States in 1999.

Autocar, Diamond T, and White built prototypes of this vehicle. Diamond T built 1,000 Model 967s in 1940. In 1941 their improved Model 968 was standardized and went into production at their Chicago plant. They would build over 30,000 chassis between 1940 and 1945.

The company’s name was created when Charles Arthur Tilt’s father, shoe maker, chose as quality emblem for its products, the diamond. The T of Tilt was included in a diamond originally painted gold. His son who grew up in a workshop environment with machines everywhere built his first car in 1905.

When a loyal customer asked him to build a truck in 1911, the Company took on a new direction. As the result of the success, Charles Arthur Tilt decided to discontinue car manufacturing and to concentrate solely on truck manufacturing.

The Diamond T 968 basic cargo model was a prime mover used to tow the 155 mm howitzer M1 and transport the gun crew, equipment, and ammunition. They had a pintle hitch at the rear to tow up to 11,000 pounds (5,000 kg) off-road and 25,000 pounds (11,000 kg) on road. With a short wheelbase and rear overhang, the body could only be 11 feet (3.4 m) feet long. It had sideboards with fold down troop seats and bows for an overhead tarpaulin. Two spare tires were mounted inside the body, across the front. Early models had all steel bodies, in 1942 they were replaced by largely wood types to conserve steel

GENERAL DATA - Pending
Crew 2
Weight Net (lb) 18,400
  Payload (lb)  
  Gross (lb)  
Axle load (lb:)
  Empty front: rear (each)  
  Loaded front: rear (each)  
Tires Ply 12 Size 9.00 x 20 psi 70
  Tread, center to center front  
Shipping Dimensions uncrated    
Vehicle Dimensions ground clearance inches 11
  Height inches 114
  Width inches 96
  Length inches 289
Shipping dimensions (cu ft) (sq ft)  
Pintle Height (in) Loaded Unloaded  
Electrical system volts 6
  Batteries number 2
  Type of ground positive
Capacities Fuel, 70 octane gasoline (gal) 60
  Cooling System (qts) 46
  Crankcase (refill) (qts) 16
Transmission (qts)  
Transfer (qts)  
Axles (front) (qts)  
Rear (each wheel) (qts)  
 Winch Oil Capacity (front) (qts)  
Rear (qts)  
Rear winch transmission (qts)  
Load capacity front (lbs)  
Load capacity (lbs) 8,000
 Brakes Manufacturer Bendix- Westinghouse Air
 Parking Brake   Type Transfer
PERFORMANCE
Maximum grade-ability (deg.) 37
Turning Radius (ft) Right 38.5 Left 37  
Fording Depth   (in) 24
Angle of approach (deg)   (deg) 37
Angle of departure (deg) 39
Fuel Capacity Average conditions gal 60
Cruising Range Average conditions (miles) 180
Maximum allowable speed (mph) 40
Number of speeds forward 5
Transfer Speeds 2
Engine
Manufacturer Hercules RXC
Type valve in head In-line, 4 cycle Cylinders 6
Displacement (cu in) 529
Bore (inch)  
Stroke (inch)  
Governed speed (rpm) 3,200
Brake Horsepower 119
Torque  
Maximum recommended toward load gross (lbs) 25,000
ADDITIONAL DATA
Height with gun mount (in) 114
Live beam axles, type on leaf springs double-reduction full-floating
Transmission Type constant-mesh

Nobody knows how many of these trucks are surviving today - many ended up in the motor pools of our Allies such as the Norwegians, the Belgians, the French and others who kept them in service for 40 plus years.

All specifications noted on the info pages for each vehicle are shown "as known." If you have corrections or input concerning any of the vehicles we would love to hear from you! Please contact us via the "Contact Us" menu item at the top of the page.