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GM–Ford 6-speed automatic transmission

{{more citations needed|date=April 2019}}

{{Infobox automobile

| name = 6T/6F

| production = 2006–present

| manufacturer = General Motors/Ford

| class = 6-speed transverse automatic transmission

| predecessor = 4T60-E/4T65-E
4T80-E
AX4N

| successor = {{ubl|

}}

}}

The GM–Ford 6-speed automatic transmission is an automatic transaxle originally designed for transverse engine applications in cars. With design work having begun in 2002, General Motors and Ford Motor Company jointly committed to investing US$720 million in their manufacturing plants to support the new transmission.

Each company has named and manufactured the transmission separately:

Ford has claimed that the 6F50 is designed to handle 300 hp (224 kW) and 280 ft·lbf (380 N·m), while General Motors has rated their 6T70 to {{Convert|315|hp|kW|0|abbr=on}} and {{convert|280|lbft|Nm|0|abbr=on}}, the 6T75 to {{Convert|315|hp|kW|0|abbr=on}} and {{convert|300|lbft|Nm|0|abbr=on}}, and the 6T80 to {{Convert|410|hp|kW|0|abbr=on}} and {{convert|369|lbft|Nm|0|abbr=on}}. GM has listed the wet (with fluids) weight of the 6T70/75/80 to be between {{Convert|102|and|104.7|kg|lbs|0|abbr=on}}.

Ford has apparently not made a public statement regarding the 6F55's maximum capabilities, but has used it in AWD in the Taurus SHO with an engine rated at {{cvt|272|kW|PS hp}} and {{cvt|475|Nm}} of torque (final drive 2.77:1 standard or 3.16:1 with SHO Performance Pckage), as well as the tenth-generation Lincoln Continental with an engine rated at {{cvt|400|hp|kW PS}} and {{cvt|400|lbft}}.

The first application of the technology was in the 2007 Ford Edge and Lincoln MKX crossover SUVs, as well as the Saturn Aura sedan and the Saturn Outlook crossover. It was also used for the Pontiac G6 GTP models and the GMC Acadia models for 2007. Prior to 2009, this transmission had issues caused by a very weak 3,5,R wave plate, which made this transmission prone to failure in GM products. Updated wave plates were released for many clutches in 6T70. The old-design wave plates were not stress-relieved and could break with use. The updated wave plates have been available under the following

part numbers:

class="wikitable"
ClutchPart Number
123424259063
2-624259816
3-5-Rev24254103
Low-Rev24259817

Gear ratios:

class=wikitable

!1

!2

!3

!4

!5

!6

!R

!Final drive

4.484

|2.872

|1.842

|1.414

|1.000

|0.742

|2.88

|2.44, 2.77, 3.16, 3.39

Applications:

GM:

Ford:

See also

Sources

  • {{cite web|url=http://media.ford.com/article_display.cfm?article_id=21986 |title=New fuel-saving 6-speed transaxle to propel Ford Edge to head of crossover utility class |work=Ford Motor Company press release |accessdate=November 9, 2005 |url-status=dead |archiveurl=https://web.archive.org/web/20121005092005/http://media.ford.com/article_display.cfm?article_id=21986 |archivedate=October 5, 2012 }}
  • {{cite web|url=http://www.theautochannel.com/news/2005/08/25/141299.html|title=New Hydra-Matic 6T70 Six-Speed Automatic Delivers Performance and Fuel Economy|work=TheAutoChannel|accessdate=January 20, 2006}}
  • {{cite web|url=http://www.autotrends.org/technology/transmissions/|title=Technologically Advanced Transmissions Enter GM Fleet|work=AutoTrends|accessdate=June 3, 2008|url-status=dead|archiveurl=https://web.archive.org/web/20080625224549/http://www.autotrends.org/technology/transmissions/|archivedate=June 25, 2008}}

References

{{reflist}}

6F

6T70

Category:Motor vehicles manufactured in the United States