1950 Nash Rambler Transmission
The Borg Warner Overdrive Transmission
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 R10 R11 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 11 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.
R10B-1G W.G SB4 E3-0
SOLENOID 4AR10B-62
Part No 311 4537 (Page 6.328)
Part No 311 4537 (Page 6.328)
The round device on the side is the Governor.
T96-1A W.G DIV N
Document about Overdrive
| nash_1950_overdrive.docx |
Lubrication
Lubrication Caution: Do not use anything higher than GL-1 in the overdrive transmissions. Modern gear oils are up to GL-5 or higher now, but the modern detergents in the gear oil will attack the bronze parts inside of the transmission.
And DO NOT use modern synthetic gear oil in the overdrive transmission. It is too slippery and the overdrive sun gear will not engage. You will have to disassemble the transmission and clean every part to get all of the slippery film off all of the internal parts. Not a fun job!
All Overdrives use 80-90w weight oil. Do NOT use synthetic oil.
And DO NOT use modern synthetic gear oil in the overdrive transmission. It is too slippery and the overdrive sun gear will not engage. You will have to disassemble the transmission and clean every part to get all of the slippery film off all of the internal parts. Not a fun job!
All Overdrives use 80-90w weight oil. Do NOT use synthetic oil.
Youtube
https://www.youtube.com/watch?v=C_xCNKaRBUE
For more technical Information on the Borg Warner Overdrive transmission, to buy new Borg Warner overdrive transmission parts or for questions, feel free to contact me at www.fifthaveinternetgarage.com.
Wiring Diagram
Guide to R10
| bwod-free_report-pdf-1-21.pdf |
The Manual
| borg-warner-r10-r11-overdrive-manual.pdf |
Spare Parts
http://hermtheoverdriveguy.com/borg-warner-overdrives