Jump to content

Ford 8F transmission

From Tilcayo Cats, the lean encyclopaedia by Tilcayo Knowledge Systems
8F 24 • 8F 35 • 8F 40 • 8F 57
8F SelectShift
Overview
ManufacturerFord
Production2019–present
Body and chassis
Class8-speed transverse automatic transmission
RelatedGM 9T50
Chronology
Predecessor6F35/6F50/6F55

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.

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]

Design

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

8FXX gear ratios[5][6][7]
1 2 3 4 5 6 7 8 R
4.689 3.306 3.012 1.923 1.446 1.000 0.747 0.617 2.960

8F24

The 8F24 is designed for engines with a maximum output of 240 N⋅m (180 lbf⋅ft).[4]

Applications

8F35

The 8F35 is derived from the GM 9T50[8] and both share components with the GM 6T40 and Ford 6F35.[7] 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.[9] 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.[6] It is designed for engines with a maximum output of 350 N⋅m (260 lbf⋅ft).[4]

Applications

8F40

Applications

8F57

The 8F57 is designed for engines with a maximum output of 575 N⋅m (424 lbf⋅ft).[4]

Applications

8F SelectShift (Unknown model number)

Applications

See also

References

  1. ↑ Brooke, Lindsay (April 15, 2013). "Ford and GM finally consummate 9- and 10-speed joint development". Automotive Engineering. Archived from the original on March 25, 2018. Retrieved 12 December 2023.
  2. ↑ Martinez, Michael (April 23, 2018). "No thanks, Ford says to 9-speed offered by GM". Automotive News. Retrieved 12 December 2023.
  3. ↑ Tracy, David (April 23, 2018). "Why Ford Isn't Using GM's Nine-Speed Automatic Transmission". Jalopnik. Retrieved 12 December 2023.
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Cargill, Mike (March 1, 2019). "Ford Motor Company and the Hat Trick". Transmission Digest. Retrieved 18 December 2023.
  5. ↑ "General Motors 9T50 Nove Velocidades Treinamento Técnico" [General Motors 9T50 nine-speed technical training] (PDF) (in português). Cambio Automatico do Brasil. Archived from the original (PDF) on 12 December 2023. Retrieved 12 December 2023.
  6. ↑ 6.0 6.1 Brayton, Bill (May 4, 2020). "Fun with transmissions: Ford's New 8-Speed". Gears. Retrieved 12 December 2023.
  7. ↑ 7.0 7.1 Brayton, Bill (June 28, 2019). "Fun with transmissions: There's a New 9 Speed On The Block". Gears. Retrieved 12 December 2023.
  8. ↑ Brayton, Bill (June 2, 2022). "Fun with transmissions: The 8F35: A closer look". Gears. Retrieved 12 December 2023.
  9. ↑ "Ford Downshifts its Eight-Speed transmission into a Seven-Speed Package". My Transmission Experts. May 24, 2021. Retrieved 18 December 2023.
  10. ↑ "SSM 54797" (PDF). NHTSA. Retrieved 7 August 2026.
  11. ↑ "SSM 50212" (PDF). NHTSA. Retrieved 7 August 2026.
Retrieved from "https://tilcayo.cat/w/index.php?title=Ford_8F_transmission&oldid=29589"
This page contains text imported from the English Wikipedia (source revision 1375131093). Its authors are credited under CC BY-SA 4.0: see the attribution record.