John H. Barker leaves a successful business in Chicago to become general manager of the company. A favorable economic environment and an inherited keen eye for viable business prospects propel the company toward phenomenal success. Upon retirement, John Barker, Sr. moves to Chicago until is death in 1878. In 1883, John H. Barker becomes president of his father's company. In the ensuing years, the factory grows to an average annual output of 15,000 cars. The accumulated estate grows to an estimated fifty to sixty million dollars by 1910.

Mass production methods were introduced at the Car Works more than fifty years before Henry Ford would refine them and put them to use in Detroit on what would become known as the assembly line.