Scalawagons of Oz (c.1941)

The Wizard creates Scalawagons, intelligent cars that can also fly. He makes Tik-Tok superintendent of the Scalawagons Factory, but the mechanical man runs down. Bell Snickle, a mysterious creature, takes advantage of Tik-Tok's condition by filling the scalawagons with "flabber-gas" and the Wizard nearly loses his scalawagons.