section_path: Career/Transmission Patent/Model A and Ford's later career
section_name: Model A and Ford's later career
paragraph_text: Model A and Ford's later career
  
  By 1926, flagging sales of the Model T finally convinced Ford to make a new model. He pursued the project with a great deal of interest in the design of the engine, chassis, and other mechanical necessities, while leaving the body design to his son. Although Ford fancied himself an engineering genius, he had little formal training in mechanical engineering and could not even read a blueprint. A talented team of engineers performed most of the actual work of designing the Model A (and later the flathead V8) with Ford supervising them closely and giving them overall direction. Edsel also managed to prevail over his father's initial objections in the inclusion of a sliding-shift transmission.
  
  The result was the Ford Model A, introduced in December 1927 and produced through 1931, with a total output of more than four million. Subsequently, the Ford company adopted an annual model change system similar to that recently pioneered by its competitor General Motors (and still in use by automakers today). Not until the 1930s did Ford overcome his objection to finance companies, and the Ford-owned Universal Credit Corporation became a major car-financing operation. Henry Ford still resisted many technological innovations such as hydraulic brakes and all-metal roofs, which Ford vehicles did not adopt until 1935–36. For 1932 however, Ford dropped a bombshell with the flathead Ford V8, the first low-price eight-cylinder engine. The flathead V8, variants of which were used in Ford vehicles for 20 years, was the result of a secret project launched in 1930 and Henry had initially considered a radical X-8 engine before agreeing to a conventional design. It gave Ford a reputation as a performance make well-suited for hot-rodding.
  
  Ford did not believe in accountants; he amassed one of the world's largest fortunes without ever having his company audited under his administration. Without an accounting department, Ford had no way of knowing exactly how much money was being taken in and spent each month, and the company's bills and invoices were reportedly guessed at by weighing them on a scale. Not until 1956 would Ford be a publicly-traded company.
  
  Also, at Edsel's insistence, Ford launched Mercury in 1939 as a mid-range make to challenge Dodge and Buick, although Henry also displayed relatively little enthusiasm for it.