Borg Warner Overdrive

Borg Warner R10-R11 Overdrive Electrical Parts for all 13 Car Manufactures from 1937-1964

The original Borg-Warner Corporation was formed in 1928 by the merger of Warner Gear which itself was founded by Thomas Warner in 1901 and Borg & Beck founded by Charles Borg and Marshall Beck in 1903. The company was best known as the supplier of Warner Gear Overdrive units from 1930’s to the 1970’s and as the developer of the Studebaker three-speed automatic transmission introduced in 1950. Ford took up development of the transmission in Studebaker's place in 1955. The early Ford automatics are derivatives from Borg Warner.

As the roads improved and car speeds continued to increase there was a need for a transmission that would allow the engine to turn slower at higher speeds and still have the low end torque for climbing hills. The Borg-Warner overdrive transmission was first introduced in the 1934 Chryslers and DeSoto then used by Ford, GM, Hudson, Kaiser-Frazier, Packard, Studebaker and Willys, all total of 13 auto manufactures used this transmission. Ford first used Borg-Warner overdrive’s in the Lincoln Zephyr in 1941. Then became optional on Ford and Mercury cars from 1949 and then faded from use in cars in the ‘60s. Ford pickups continued to offer overdrive into the ‘70s. Borg-Warner R10 and R11 use a planetary gear set that fit in between the transmission and the tail shaft housing and offered a .70:1 ratio to slow the engine down at the new highway speeds. Learn more about the Borg Warner R10- R11 overdrive with our FREE report.