retired in 1985 and was immediately called back to become vice president of engineering for the AM General division of AMC. The High Mobility Multipurpose Wheeled Vehicle military Jeep (Hummer) was going into production and Lunn was charged with overseeing the corrective actions to achieve acceptance by the U.S. Army. Retirement Lunn retired to his home in Florida in 1987 where he continued to work on various projects. He relocated to Santa Barbara, California, in 2015 and served as a mentor to students in the mechanical engineering program at the University of California, Santa Barbara. Lunn suffered a stroke in late July and died of its complications on August 5, 2017. Notes References American automotive engineers 1925 births 2017 deaths American Motors people Ford people English emigrants to the United States