John Deere Tanks: Iowa Time Machine August 3, 1942

Iowa Time Machine ⏰: On August 3, 1942, the John Deere Transmission Company of Waterloo was awarded the prestigious Army-Navy “E” for Excellence Award in July 1942, recognizing “high achievement and exceptional performance” in the production of war equipment.

During World War II, the John Deere Iowa Transmission Company of Waterloo played a transformative role in the nation’s war effort by shifting from agricultural machinery to vital military manufacturing. As America entered the conflict, Waterloo’s reputation for excellence in heavy gear transmission production positioned John Deere as a key supplier to the U.S. military. The government called upon the company to deliver robust transmissions for Sherman tanks, initially designed by Iowa’s own General Joseph Colby.

When war regulations sharply limited domestic tractor production, John Deere responded by establishing the Iowa Transmission Company, a subsidiary dedicated to meeting urgent military needs. The plant’s workforce, men and women working side by side for equal pay, rose to the occasion, adapting rapidly from tractors to the complex engineering required by war machines. By the peak of the conflict, the company was producing approximately 1,000 transmissions and final drive units per month, ultimately manufacturing 22,000 units for the M3 and M4 Sherman tanks, as well as other military vehicles.

John Deere’s Waterloo facility earned more than 1,000 government contracts from 1941 to 1943, contributing military tractors, ammunition casings, mobile laundry units, and aircraft parts for Grumman, Curtiss, and Douglas warplanes. Engineering ingenuity was key: the factory’s experts even resolved a known weakness in the Sherman tank’s local transmission, demonstrating an advanced capacity for field-based problem solving and innovation. By embracing the demands of wartime production, the company advanced both military victory and workforce equality, while also demonstrating the flexibility and resourcefulness that would define postwar American manufacturing. #IowaOTD #IowaHistoryDaily #IowaHistoryCalendar