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Ford 8F transmission

{{Short description|Transversely-mounted automatic transmission}}

{{Infobox automobile

|image =

|name = 8F24/8F35/8F40/8F57/ 8F SelectShift

|production = 2019–present

|manufacturer = Ford

|class = 8-speed transverse automatic transmission

|predecessor = 6F35/6F50/6F55

|related = GM 9T50

}}

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.{{cite news |url=http://articles.sae.org/12015/ |title=Ford and GM finally consummate 9- and 10-speed joint development |first=Lindsay |last=Brooke |date=April 15, 2013 |work=Automotive Engineering |access-date=12 December 2023 |archive-url=https://web.archive.org/web/20180325045257/http://articles.sae.org/12015/ |archive-date=March 25, 2018 |url-status=dead}} 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.{{cite news |url=https://www.autonews.com/article/20180423/OEM01/180429934/no-thanks-ford-says-to-9-speed-offered-by-gm |title=No thanks, Ford says to 9-speed offered by GM |first=Michael |last=Martinez |date=April 23, 2018 |work=Automotive News |url-access=subscription |access-date=12 December 2023}}{{cite news |url=https://jalopnik.com/why-ford-isn-t-using-gm-s-nine-speed-automatic-transmis-1825465785 |title=Why Ford Isn't Using GM's Nine-Speed Automatic Transmission |first=David |last=Tracy |date=April 23, 2018 |work=Jalopnik |access-date=12 December 2023}}

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.{{cite magazine |url=https://www.transmissiondigest.com/ford-motor-company-and-the-hat-trick/ |title=Ford Motor Company and the Hat Trick |first=Mike |last=Cargill |date=March 1, 2019 |magazine=Transmission Digest |access-date=18 December 2023}}

Models

class="wikitable" style="font-size:100%;text-align:center;"

|+8FXX gear ratios{{cite web |url=https://cambioautomaticodobrasil.com.br/painel/public/pdf/15949204245f108de8e4079.pdf |title=General Motors 9T50 Nove Velocidades Treinamento Técnico |language=pt |trans-title=General Motors 9T50 nine-speed technical training |publisher=Cambio Automatico do Brasil |access-date=12 December 2023}}{{cite magazine |url=https://gearsmagazine.com/magazine/the-8f35-a-closer-look/ |title=Fun with transmissions: There's a New 9 Speed On The Block |first=Bill |last=Brayton |date=June 28, 2019 |magazine=Gears |access-date=12 December 2023}}

! 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 {{cvt|240|Nm}}.

;Applications:

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{{div col end}}

=8F35=

The 8F35 is derived from the GM 9T50{{cite magazine |url=https://gearsmagazine.com/magazine/the-8f35-a-closer-look/ |title=Fun with transmissions: The 8F35: A closer look |first=Bill |last=Brayton |date=June 2, 2022 |magazine=Gears |access-date=12 December 2023}} and both share components with the GM 6T40 and Ford 6F35. The change in ratio between the 2nd and 3rd gears is relatively small; in later versions, the transmission is instructed to skip 2nd gear entirely to enhance throttle response.{{cite web |url=https://www.mytransmissionexperts.com/ford-downshifts-its-eight-speed-transmission-into-a-seven-speed-package/ |title=Ford Downshifts its Eight-Speed transmission into a Seven-Speed Package |date=May 24, 2021 |website=My Transmission Experts |access-date=18 December 2023}} 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.{{cite magazine |url=https://gearsmagazine.com/magazine/fords-new-8-speed/ |title=Fun with transmissions: Ford's New 8-Speed |first=Bill |last=Brayton |date=May 4, 2020 |magazine=Gears |access-date=12 December 2023}} It is designed for engines with a maximum output of {{cvt|350|Nm}}.

;Applications:

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{{div col end}}

=8F40=

;Applications:

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{{div col end}}

=8F57=

The 8F57 is designed for engines with a maximum output of {{cvt|575|Nm}}.

;Applications:

{{div col |colwidth=20em}}

{{div col end}}

=8F SelectShift=

;Applications:

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See also

References

{{reflist}}

Category:Ford transmissions