Borg Warner Overdrive

Explore our selection of electrical components for the iconic Borg Warner R10 and R11 overdrive transmissions, a testament to the innovation of the original Borg-Warner Corporation, formed in 1928 from the merger of Warner Gear and Borg & Beck. Warner Gear, founded in 1901, became synonymous with these overdrive units, crucial for adapting to increasing road speeds from the 1930s through the 1970s. Introduced initially in 1934 by Chrysler and DeSoto, the Borg-Warner overdrive was adopted by a total of 13 car manufacturers between 1937 and 1964, including Ford (starting with the Lincoln Zephyr in 1941, then Ford and Mercury from 1949), General Motors, Chrysler Corporation, Hudson, Kaiser-Frazier, Packard, Studebaker, and Willys.

The R10 and R11 units, featuring a planetary gear set, offered a valuable .7:1 ratio, allowing engines to run slower at highway speeds while retaining low-end torque. Our page provides the essential electrical parts – solenoids, relays, switches, wiring – needed to maintain or restore the functionality of these vital overdrive systems in your classic vehicle. Keep the legacy of Warner Gear alive and enjoy smoother, more economical highway cruising.