Engineering:Ford 8F transmission
| 8F24/8F35/8F40/8F57/ 8F SelectShift | |
|---|---|
| Overview | |
| Manufacturer | Ford |
| Production | 2019–present |
| Body and chassis | |
| Class | 8-speed transverse automatic transmission |
| Chronology | |
| Predecessor | |
The Ford 8F transmission is a family of automatic transmissions with eight forward speeds for light-duty transversely-mounted applications. It is designed and manufactured by Ford Motor Company starting in 2019; the 8F35 is derived from the General Motors 9TXX family, which in turn was developed from an earlier GM 6T40 transmission.
Design / history
Ford and GM announced a joint venture to share automatic transmission designs in April 2013: GM would adopt a 10-speed longitudinal transmission primarily designed by Ford, while Ford would adopt the GM 9T 9-speed transverse transmission.[1] Ford declined to use the GM 9T, however, as the promised improvement in fuel consumption was less than expected, and removed one gear, resulting in the Ford 8F35.[2][3]
At the same time, Ford also launched the 8F24 and 8F57 transmissions. The 8F24 is unique to Ford, while the 8F57 is derived from an earlier GM-Ford 6-speed automatic transmission.[4]
Models
8F24
The 8F24 is designed for engines with a maximum output of 240 N⋅m (180 lbf⋅ft).[4]
- Applications
- Ford Focus (1.0 EcoBoost)
8F35
The 8F35 is derived from the GM 9T50[5] and both share components with the GM 6T40 and Ford 6F35.[6] The change in ratio between the 2nd and 3rd gears is relatively small;[4] in later versions, the transmission is instructed to skip 2nd gear entirely to enhance throttle response.[7] It uses six solenoids (on two driving clutches and four brake clutches), and a selectable one-way clutch, applied in different combinations to engage the eight forward speeds and reverse.[8] It is designed for engines with a maximum output of 350 N⋅m (260 lbf⋅ft).[4]
- Applications
- Ford Edge (2.0 Duratorq, 2.0 EcoBoost)
- Ford Escape (1.5 EcoBoost, 2.0 EcoBoost)
- Ford Focus (1.5 EcoBoost)
- Ford Maverick (2.0 EcoBoost)
- Ford S-MAX (1.5 EcoBoost, 2.0 Duratorq, 2.0 EcoBoost)
- Ford Taurus (2.0 EcoBoost)
8F40
- Applications
- Ford Edge (2.0 EcoBlue)
- Ford Focus (2.0 EcoBlue)
- Ford Galaxy (2.0 EcoBlue)
- Ford Kuga (2.0 EcoBlue)
- Ford Mondeo (2.0 EcoBlue)
- Ford S-MAX (2.0 EcoBlue)
8F57
The 8F57 is designed for engines with a maximum output of 575 N⋅m (424 lbf⋅ft).[4]
- Applications
- Ford Edge ST (2.7 V6 EcoBoost)
- Ford Explorer (2.7 V6 EcoBoost)
- Ford Fusion (2.7 V6 EcoBoost)
- Ford Taurus (2.7 V6 EcoBoost)
8F SelectShift
- Applications
- Lincoln Corsair
- Lincoln Z
See also
References
- ↑ Brooke, Lindsay (April 15, 2013). "Ford and GM finally consummate 9- and 10-speed joint development". Automotive Engineering. http://articles.sae.org/12015/.
- ↑ Martinez, Michael (April 23, 2018). "No thanks, Ford says to 9-speed offered by GM". Automotive News. https://www.autonews.com/article/20180423/OEM01/180429934/no-thanks-ford-says-to-9-speed-offered-by-gm.
- ↑ Tracy, David (April 23, 2018). "Why Ford Isn't Using GM's Nine-Speed Automatic Transmission". Jalopnik. https://jalopnik.com/why-ford-isn-t-using-gm-s-nine-speed-automatic-transmis-1825465785.
- ↑ 4.0 4.1 4.2 4.3 4.4 Cargill, Mike (March 1, 2019). "Ford Motor Company and the Hat Trick". Transmission Digest. https://www.transmissiondigest.com/ford-motor-company-and-the-hat-trick/. Retrieved 18 December 2023.
- ↑ Brayton, Bill (June 2, 2022). "Fun with transmissions: The 8F35: A closer look". Gears. https://gearsmagazine.com/magazine/the-8f35-a-closer-look/. Retrieved 12 December 2023.
- ↑ Brayton, Bill (June 28, 2019). "Fun with transmissions: There's a New 9 Speed On The Block". Gears. https://gearsmagazine.com/magazine/the-8f35-a-closer-look/. Retrieved 12 December 2023.
- ↑ "Ford Downshifts its Eight-Speed transmission into a Seven-Speed Package". May 24, 2021. https://www.mytransmissionexperts.com/ford-downshifts-its-eight-speed-transmission-into-a-seven-speed-package/.
- ↑ Brayton, Bill (May 4, 2020). "Fun with transmissions: Ford's New 8-Speed". Gears. https://gearsmagazine.com/magazine/fords-new-8-speed/. Retrieved 12 December 2023.
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