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Ford Truck, Amphibian, GPA, 1/4 ton, 4x4

The GPA amphibious jeep was developed by Ford Motor Company from components of the Ford GPW 1/4 ton 4x4 jeep. Naval architects designed the amphibious hull, the same firm that designed the 2 1/2 DUKW amphibious truck. The GPA was manufactured by Ford during World War II, starting in 1942 and ending in March 1943. The GPA was not popular or successful with the U.S. military, judged too small, difficult to maneuver and subject to swamping in any significant waves. However, GPAs were supplied to the Soviet Union under Lend Lease and the Soviets continued to manufacture the GPA (as the GAZ 011) after Ford's contracts were concluded.

The Ford GPA was also called the "Seep" for "Sea Jeep" or sometimes the "jeep in a bathtub."

Ford Truck, Amphibian, GPA, 1/4 ton, 4x4, 1945 photo
Ford Truck, Amphibian, GPA, 1/4 ton, 4x4, 1945 photo.

Today in WW II: 20 Apr 1945 Northern Italy: US 5th Army breaks out beyond the Apennines, into the broad Po River Valley, forcing retreat across the Po by forces of German Gen. Heinrich Von Vietinghoff.   

Ford Truck, Amphibian, GPA, 1/4 ton, 4x4 (G-504) Specifications

Length182 inches
Width64 inchest
Height66 1/4 inches
Gross Weight4,460 lbs
Net Weight3,665 lbs
EngineFord 4 cyl 134 cid, 54 hp
Transmission3 speed
Transfer case2 speed
Water speed5.5 mph
Road speed5o mph
Number mfgapprox. 12,750

The Ford GPA running gear (engine, transmission, transfer case, axles) were essentially the same as the Ford GPW jeep, but the amphibious GPA vehicle was longer than the GPW jeep. The 84 inch wheelbase was four inches longer than the jeep and the hull extended to the front and rear of the axles. The interior layout was similar to the GPW, a spare tire and anchor where stored on the rear deck, a capstan winch on the front deck, and a rifle rack was mounted on the windshield. A propeller and rudder were mounted on the rear of the GPA along with a standard pintle hook.

Ford GPA Amphibian, 1/4-ton, 4x4 Photos

Find additional photos and hi-res versions of the Ford GTA Amphibious 1/4-ton 4x4 at the Olive-Drab Military Mashup:

Vehicles parked in outbound park, Norfolk Army Base, before transportation overseas, 27 May 1943. Vehicles included CCKW 6x6 trucks, jeeps, staff cars, 2 1/2-ton amphibious trucks (DUKW), Ford GPA amphibious jeeps, motorcycles, all camouflaged. These vehicles accompanied the 45th Division when it sailed from Hampton Roads Port of Embarkation, Newport News, VA, early in June 1943 for service in Africa, Sicily and Italy.
Long line of Ford GPA amphibious jeeps and other vehicles at a staging area during WW II.
CPT W. Young in front of Ford GPA amphibious jeeps and DUKW amphibian truck, camouflaged and processed for shipment overseas, 27 May 1943. These vehicles accompanied the 45th Division when it sailed from Hampton Roads Port of Embarkation, Newport News, VA, early in June 1943 for service in Africa, Sicily and Italy.
Ford Truck, Amphibian, GPA, 1/4 ton, 4x4.
Ford Truck, Amphibian, GPA, 1/4 ton, 4x4. Photo from Berlin-Patrol 2011, courtesy of Abraham Telvi.
Ford Truck, Amphibian, GPA, 1/4 ton, 4x4 crossing a river during training, WW II.

Ford GPA Amphibian, 1/4-ton, 4x4 Photo Gallery

Ford Truck, Amphibian, GPA, 1/4 ton, 4x4 (G-504). Photo: Courtesy of Dennis P. Nolan
Ford Truck, Amphibian, GPA, 1/4 ton, 4x4 (G-504). Photo: Courtesy of Dennis P. Nolan.

45th Division GPAs ready for shipment with the Division for service in North Africa, Sicily and Italy, Hampton Roads Port of Embarkation, 27 May 1943.  The officer is identified as Capt. W. Young
45th Division GPAs ready for shipment with the Division for service in North Africa, Sicily and Italy, Hampton Roads Port of Embarkation, 27 May 1943. The officer is identified as Capt. W. Young.

Ford GPA assigned to Lend Lease for the Soviet Union, employed by the Soviet 14th Army to cross water obstacles
Ford GPA assigned to Lend Lease for the Soviet Union, employed by the Soviet 14th Army to cross water obstacles.

Ford GPA crossing river during training, 442nd Regimental Combat Team, World War II
Ford GPA crossing river during training, 442nd Regimental Combat Team, World War II.

Ford GPA with trailer, during training, World War II.
Ford GPA with trailer, during training, World War II.

Ford GPAs being tested in the Huron River near Ford Motor Company's Rouge plant, Detroit, MI, during World War II.  Original caption calls the GPA an amphibian reconnaissance car.
Ford GPAs being tested in the Huron River near Ford Motor Company's Rouge plant, Detroit, MI, during World War II. Original caption calls the GPA an "amphibian reconnaissance car."

Ford GPA amphibious jeeps waiting transport at the factory, Detroit, MI, April 1943
Ford GPA amphibious jeeps waiting transport at the factory, Detroit, MI, April 1943.

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