📌 GMC CCKW 2½-ton 6x6 Cargo Truck, IWM Duxford.
The GMC CCKW, also known as ''Jimmy'', or the G-508 by its Ordnance Supply Catalog number, was a highly successful series of Off-Road capable, 2 1⁄2-ton, 6×6 Trucks, built in large numbers to a standardized design between 1941 to 1945 for the U.S. Army, that saw heavy service, predominantly as Cargo Trucks, in both World War Two and the Korean War. The original ''Deuce and a Half'' it formed the backbone of the famed ''Red Ball Express'' that kept Allied Armies supplied as they pushed eastward after the Normandy invasion.
The CCKW came in many variants, including open or closed cab, long wheelbase (LWB) CCKW-353 and short (SWB) CCKW-352, and over a score of specialized models, but the bulk were standard, General Purpose Cargo models. A large minority were built with a front mounted winch, and one in four of the cabs had a Machine-Gun mounting ring above the Co-Driver's position.
Of the almost 2.4 million trucks that the U.S. Army bought between 1939 and December 1945, across all payload weight classes, some 812,000, or just over one third, were 2 1⁄2-ton trucks. GMC's total production of the CCKW and its variants, including the 2 1⁄2-ton, 6x6, Amphibious DUKW, and the 6x4, 5-ton (on-road) CCW-353, amounted to some 572,500 units, almost a quarter of the total World War Two U.S. truck production, and 70% of the total 2 1⁄2-ton trucks. GMC's total of ~550,000 purely 6x6 models, including the DUKW, formed the overwhelming majority of the ~675,000 six by six 2 1⁄2-ton trucks, and came in less than 100,000 shy of the almost 650,000 World War Two Jeeps. Additionally, GM built over 150,000 units of the CCKW's smaller brother, the 1 1⁄2-ton, 4x4 Chevrolet G506, at the same factory. The GMC CCKW began to be phased out, once the M35 series trucks were first deployed in the 1950's, but remained in active U.S. service until the mid-1960's. Eventually, the M35 series, originally developed by REO Motors, succeeded the CCKW as the U.S. Army's standard 2 1⁄2-ton, 6x6 Cargo Truck.
The name CCKW comes from GMC model nomenclature:-
** ''C'' - designed in 1941
** ''C'' - conventional cab
** ''K'' - all-wheel drive
** ''W'' - dual rear axles
** ''X'' experimental chassis / non-standard wheelbase (first 13,188 units)
In 1939-1940 the U.S. Army Ordnance Corps was developing 2 1⁄2 short tons load-rated 6x6 Tactical Trucks that could operate off-road in all weather. General Motors, already supplying modified commercial trucks to the Army, modified the 1939 ACKWX (built for the French Army) into the CCKW. The General Motors design was chosen by the Army and went into production at GM'S Yellow Truck and Coach Division's Pontiac, Michigan plant alongside 6x4 CCW's. Later they were also manufactured at GM's St. Louis, Missouri Chevrolet plant.
Sources do not precisely agree on the total numbers of CCKW's built by the end of production in 1945. Ware (2010) lists one single number of 562,750 of CCKW trucks, built across all variants (presumably including the amphibian DUKW) more clearly specified numbers are provided by Sunderlin in Army Motors magazine, and by Jackson, using the numbers found in the 1946 revision of the U.S. Military's Summary Report of Acceptances, Tank-Automotive Materiel. Sunderlin reports a total of 528,829 of 2 1⁄2-ton 6x6 units (excluding the DUKW) produced by GMC, versus a total of 527,168 accepted by the U.S. Army. Jackson's tabulation of the 1946 U.S. acceptances numbers adds up to 524,873 units, excluding the DUKW's and the ACKWX predecessor models. Both of these numbers still include the cab-over engine AFKWX-353 models, leaving a total of some 518,000–519,000 actual CCKW-352 and CCKW-353 units. In addition, GMC serial numbers indicate a production of 23,500 of the same bodied 6x4 CCW models, versus 23,649 units accepted by U.S. Ordnance. In any case, GM / GMC built a total of 2 1⁄2-ton, 6-wheeled trucks that was second only to the World War Two ''Jeep'' and neither Ford nor Willys individually built as many Jeeps during the war.
▪︎Type: 2 1⁄2-ton 6×6 Cargo Truck
▪︎Place of Origin: United States
▪︎Designer: Yellow Truck and Coach Company
▪︎Designed: 1941
▪︎Manufacturer: Yellow Truck and Coach Company / GMC Truck and Coach Division / Chevrolet ▪︎Produced: 1941 to 1945
▪︎Number Built: Grand Total = ~572,500, including all variants, CCKW specific = ~518,000 / LWB CCKW-353 = ~464,000 / SWB CCKW-352 = ~54,000 / plus ~54,500 non CCKW
▪︎Variants: 1939 ACKWX = 2,466 units / C.O.E. AFKWX = 7,235 units / 6x4 CCW-353 = 23,649 units / DUKW Amphibious =21,147 units
▪︎Mass: (353 Cargo w/winch) 8,800lb empty / 16,400lb loaded
▪︎Length: 22ft 6in / Width: 7ft 4in / Height: 7ft 9in to cab / 9ft 1in overall
▪︎Powerplant: GMC 270 straight-6 engine, 91.5hp at 2,750rpm / 104hp at 2,750rpm
▪︎Transmission: 5 speed x 2 range transfer case
▪︎Suspension: Beam axles on leaf springs
▪︎Fuel Capacity: 40 U.S gallons
▪︎Operational Range: 300 miles
▪︎Maximum Speed: 45mph.
Taken from Wikipedia en.m.wikipedia.org/wiki/GMC_CCKW_2%C2%BD-ton_6%C3%976_truck
📌 GMC CCKW 2½-ton 6x6 Cargo Truck, IWM Duxford.
The GMC CCKW, also known as ''Jimmy'', or the G-508 by its Ordnance Supply Catalog number, was a highly successful series of Off-Road capable, 2 1⁄2-ton, 6×6 Trucks, built in large numbers to a standardized design between 1941 to 1945 for the U.S. Army, that saw heavy service, predominantly as Cargo Trucks, in both World War Two and the Korean War. The original ''Deuce and a Half'' it formed the backbone of the famed ''Red Ball Express'' that kept Allied Armies supplied as they pushed eastward after the Normandy invasion.
The CCKW came in many variants, including open or closed cab, long wheelbase (LWB) CCKW-353 and short (SWB) CCKW-352, and over a score of specialized models, but the bulk were standard, General Purpose Cargo models. A large minority were built with a front mounted winch, and one in four of the cabs had a Machine-Gun mounting ring above the Co-Driver's position.
Of the almost 2.4 million trucks that the U.S. Army bought between 1939 and December 1945, across all payload weight classes, some 812,000, or just over one third, were 2 1⁄2-ton trucks. GMC's total production of the CCKW and its variants, including the 2 1⁄2-ton, 6x6, Amphibious DUKW, and the 6x4, 5-ton (on-road) CCW-353, amounted to some 572,500 units, almost a quarter of the total World War Two U.S. truck production, and 70% of the total 2 1⁄2-ton trucks. GMC's total of ~550,000 purely 6x6 models, including the DUKW, formed the overwhelming majority of the ~675,000 six by six 2 1⁄2-ton trucks, and came in less than 100,000 shy of the almost 650,000 World War Two Jeeps. Additionally, GM built over 150,000 units of the CCKW's smaller brother, the 1 1⁄2-ton, 4x4 Chevrolet G506, at the same factory. The GMC CCKW began to be phased out, once the M35 series trucks were first deployed in the 1950's, but remained in active U.S. service until the mid-1960's. Eventually, the M35 series, originally developed by REO Motors, succeeded the CCKW as the U.S. Army's standard 2 1⁄2-ton, 6x6 Cargo Truck.
The name CCKW comes from GMC model nomenclature:-
** ''C'' - designed in 1941
** ''C'' - conventional cab
** ''K'' - all-wheel drive
** ''W'' - dual rear axles
** ''X'' experimental chassis / non-standard wheelbase (first 13,188 units)
In 1939-1940 the U.S. Army Ordnance Corps was developing 2 1⁄2 short tons load-rated 6x6 Tactical Trucks that could operate off-road in all weather. General Motors, already supplying modified commercial trucks to the Army, modified the 1939 ACKWX (built for the French Army) into the CCKW. The General Motors design was chosen by the Army and went into production at GM'S Yellow Truck and Coach Division's Pontiac, Michigan plant alongside 6x4 CCW's. Later they were also manufactured at GM's St. Louis, Missouri Chevrolet plant.
Sources do not precisely agree on the total numbers of CCKW's built by the end of production in 1945. Ware (2010) lists one single number of 562,750 of CCKW trucks, built across all variants (presumably including the amphibian DUKW) more clearly specified numbers are provided by Sunderlin in Army Motors magazine, and by Jackson, using the numbers found in the 1946 revision of the U.S. Military's Summary Report of Acceptances, Tank-Automotive Materiel. Sunderlin reports a total of 528,829 of 2 1⁄2-ton 6x6 units (excluding the DUKW) produced by GMC, versus a total of 527,168 accepted by the U.S. Army. Jackson's tabulation of the 1946 U.S. acceptances numbers adds up to 524,873 units, excluding the DUKW's and the ACKWX predecessor models. Both of these numbers still include the cab-over engine AFKWX-353 models, leaving a total of some 518,000–519,000 actual CCKW-352 and CCKW-353 units. In addition, GMC serial numbers indicate a production of 23,500 of the same bodied 6x4 CCW models, versus 23,649 units accepted by U.S. Ordnance. In any case, GM / GMC built a total of 2 1⁄2-ton, 6-wheeled trucks that was second only to the World War Two ''Jeep'' and neither Ford nor Willys individually built as many Jeeps during the war.
▪︎Type: 2 1⁄2-ton 6×6 Cargo Truck
▪︎Place of Origin: United States
▪︎Designer: Yellow Truck and Coach Company
▪︎Designed: 1941
▪︎Manufacturer: Yellow Truck and Coach Company / GMC Truck and Coach Division / Chevrolet ▪︎Produced: 1941 to 1945
▪︎Number Built: Grand Total = ~572,500, including all variants, CCKW specific = ~518,000 / LWB CCKW-353 = ~464,000 / SWB CCKW-352 = ~54,000 / plus ~54,500 non CCKW
▪︎Variants: 1939 ACKWX = 2,466 units / C.O.E. AFKWX = 7,235 units / 6x4 CCW-353 = 23,649 units / DUKW Amphibious =21,147 units
▪︎Mass: (353 Cargo w/winch) 8,800lb empty / 16,400lb loaded
▪︎Length: 22ft 6in / Width: 7ft 4in / Height: 7ft 9in to cab / 9ft 1in overall
▪︎Powerplant: GMC 270 straight-6 engine, 91.5hp at 2,750rpm / 104hp at 2,750rpm
▪︎Transmission: 5 speed x 2 range transfer case
▪︎Suspension: Beam axles on leaf springs
▪︎Fuel Capacity: 40 U.S gallons
▪︎Operational Range: 300 miles
▪︎Maximum Speed: 45mph.
Taken from Wikipedia en.m.wikipedia.org/wiki/GMC_CCKW_2%C2%BD-ton_6%C3%976_truck