In 1886 the Dodge family moved to Detroit, where John and his younger brother, Horace, took jobs at a boiler maker plant. In 1894 they went to work as machinists at the Dominion Typograph Company in Windsor, Ontario, Canada.Using a dirt-proof ball bearing Horace invented and patented, in 1897 Dodge arranged a deal for the brothers to join with a third-party investor to manufacture bicycles. Within a few years, they sold the bicycle business and in 1900 used the proceeds of the sale to set up their own machine shop in Detroit.
In 1902 the Dodge brothers won a contract to build transmissions for the Olds Motor Vehicle Company. However, the following year they turned down a second contract from Olds to retool their plant to build engines for Henry Ford in a deal that included a share position in the new Ford Motor Company. By 1910, John Dodge and his brother built a new plant in Hamtramck, Michigan.
For ten years (1903–1913) the Dodge brothers' business was a Ford Motor Company supplier, and Dodge worked as vice president of the Ford company.He left Ford in 1913, and in 1914 he and Horace formed Dodge Brothers to develop their own line of automobiles. They began building motor trucks for the United States military during the arms buildup for World War I, and in October 1917 they produced their first commercial car.
In 1919, Henry Ford bought out the Dodge brothers' shareholdings in Ford Motor Company for $25 million.
Because of his temper and often crude behavior, Dodge was seen as socially unacceptable to most of the well-heeled elite of Detroit. Nevertheless, his wealth made him an influential member of the community and he became active in Republican Party politics in Michigan.
co-founder of Dodge Brothers Company