Ford provided engines for nazi trucks
As did most of big industry before the war to not only Germany but to the Soviet Union also. Without all the help U.S. industry gave those two countries neither would have had the capacity to make war on the scale they did.
Ford was against U.S. involvement in WWI and WWII. He was also an anti-semitic. Hitler revered and cited Ford in Mein Kampf. He also kept a full-size photo of Ford by his desk in the Chancellery in Berlin.
"Ford overruled his son Edsel, who was running the company, and halted a lucrative federal government contract to produce 6,000 Rolls-Royce engines for British fighter planes and 3,000 engines for American warplanes." It wasn't until 1941 that Ford reluctantly agreed to start producing war materials.
Also found this article from 1999. It states that Ford had previously admitted to using slave labor in Cologne, run by Ford's German subsidiary.