![]() ![]() It had three pinion gears in the planetary gear system and a ratio of. The R10 was the most popular, used in the majority of cars. Maintaining these speeds in third gear resulted in inefficient fuel mileage and a noisy ride.Īn overdrive works by using a planetary gear to produce more evolutions in the wheels than the engine, hence the name “overdrive.” The Borg Warner Overdrive specifically could reduce RPMs by as much as 33 percent at speeds over 30 miles per hour.īorg Warner had several different overdrive options available, but the two used in automotive were the R10 and R11. ![]() High RPMs were becoming a significant challenge for cars as highway speeds increased with the advent of more powerful engines. The initial purpose of the overdrive was to reduce engine RPMs for vehicles on the highway. The Borg Warner Corporation, which formed via a merger of two long standing companies 1928, already had a background in gear and transmission manufacturing, but it was their joining of an overdrive unit to a standard three speed manual transmission to create the innovative Borg Warner Overdrive that they are most known for. Whether you are lucky enough to own a car with one installed or dream of adding such a car to your garage, here are the basics on the Borg Warner Overdrive History of the Borg Warner Overdrive The purpose was to improve gas mileage by decreasing RPMs at highway speed, made possible by providing extra gears beyond the standard three speed transmission of the time.įrom their initial rise in popularity to their downfall in the 1960s original Borg Warner Overdrives are a fantastic feature for any vintage car. The Borg Warner Overdrive first debuted in 1934 on the Chrysler Airflow and DeSoto Airflow. Over 4 million vehicles came from the manufacturer with a Borg Warner Overdrive installed and many drivers added on aftermarket overdrives which were readily and affordably available, in some cases, for as little as in some years for as little as $20. The Borg Warner Overdrive was one of the most popular add-ons for vehicles between the 1930s and 60s. Maybe it is the nostalgia or squeezing all together in the front bench seat, the affordable power of the Flathead V-8, or the thrill of switching into overdrive as you get up to speed on the highway. Every classic car enthusiast has one feature they appreciate most on classic vehicles and miss on modern cars. ![]()
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