GM–Ford 6-speed automatic transmission

TheGM–Ford 6-speed automatic transmissionis anautomatictransaxleoriginally designed fortransverse engineapplications in cars. With design work having begun in 2002,General MotorsandFord Motor Companyjointly committed to investingUS$720 million in their manufacturing plants to support the new transmission.

6T/6F
Overview
Manufacturer	General Motors/Ford
Production	2006–present
Body and chassis
Class	6-speedtransverseautomatic transmission
Chronology
Predecessor	4T60-E/4T65-E 4T80-E AX4N
Successor	GM 9TXX Ford 8FXX

Each company has named and manufactured the transmission separately:

• Fordhas built the6F50and6F55along with the6F35(related to theGM 6T40 transmission) at its Van Dyke Transmission Plant inSterling Heights, Michigan,and later atSharonville TransmissioninSharonville, Ohio.
• GM has built the6T70,6T75,and6T80atWarren TransmissioninWarren, Michiganwith production starting in July 2006.

Fordhas claimed that the 6F50 is designed to handle 300 hp (224 kW) and 280 ft·lbf (380 N·m), whileGeneral Motorshas rated their 6T70 to 315 hp (235 kW) and 280 lb⋅ft (380 N⋅m), the 6T75 to 315 hp (235 kW) and 300 lb⋅ft (407 N⋅m), and the 6T80 to 410 hp (306 kW) and 369 lb⋅ft (500 N⋅m). GM has listed the wet (with fluids) weight of the 6T70/75/80 to be between 102 and 104.7 kg (225 and 231 lb).

Ford has apparently not made a public statement regarding the 6F55's maximum capabilities, but has used it in AWD in theTaurus SHOwith an engine rated at 272 kW (370 PS; 365 hp) and 475 N⋅m (350 lbf⋅ft) of torque (final drive 2.77:1 standard or 3.16:1 with SHO Performance Pckage), as well as the tenth-generationLincoln Continentalwith an engine rated at 400 hp (300 kW; 410 PS) and 400 lb⋅ft (540 N⋅m).

The first application of the technology was in the 2007Ford EdgeandLincoln MKXcrossover SUVs,as well as theSaturn Aurasedan and theSaturn Outlookcrossover. It was also used for thePontiac G6GTP models and theGMC Acadiamodels 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:

Clutch	Part Number
1234	24259063
2-6	24259816
3-5-Rev	24254103
Low-Rev	24259817

Gear ratios:

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:

• 2007–2010Saturn AuraXR (LY7 V6 option)
• 2007Pontiac G6GTP
• 2007–2009Saturn Outlook
• 2007–2017GMC Acadia
• 2008–2009Saturn AuraXR
• 2008–2009Pontiac G6GXP
• 2008–2017Buick Enclave
• 2008–2009Chevrolet EquinoxSport
• 2008–2012Chevrolet Malibu(LY7 V6 option)
• 2008–2009Pontiac TorrentGXP
• 2009–2017Chevrolet Traverse
• 2010–2017Chevrolet Equinox(LF1, LFW, LFX V6 option)
• 2010–2016Cadillac SRX
• 2010–2016Buick LaCrosse(LF1, LLT, LFX V6 options)
• 2012–2020Chevrolet Impala
• 2013–2019Cadillac XTS
• 2010–2017GMC Terrain(LF1, LFW, LFX V6 option)
• 2008-2010Saturn VueXE AWD 3.5 V6 LZ4 XR FWD/AWD 3.6 V6 LY7

Ford:

• 2007–2018Ford Edge
• 2007–2018Lincoln MKX
• 2008–2019Ford Taurus
• 2008–2009Ford Taurus X
• 2008–2009Mercury Sable
• 2009–2019Ford Flex
• 2009–2016Lincoln MKS
• 2009–2012Ford Escape
• 2009–2011Mercury Mariner
• 2009–2011Mazda Tribute
• 2010–2020Ford Fusion
• 2013–2020Lincoln MKZ
• 2010–2011Mercury Milan
• 2010–2019Ford Taurus
• 2013-2019Ford Police Interceptor Sedan
• 2011–2019Ford Explorer
• 2013-2019Ford Police Interceptor Utility
• 2012–2022Ford Mondeo
• 2015–2018Ford C-Maxwith 1.5LEcoBoost
• 2016–2019Ford Focuswith 1.5LEcoBoost
• 2017–2020Lincoln Continental

See also

• List of Ford transmissions
• List of GM transmissions

Sources

• "New fuel-saving 6-speed transaxle to propel Ford Edge to head of crossover utility class".Ford Motor Companypress release.Archived fromthe originalon October 5, 2012.RetrievedNovember 9,2005.
• "New Hydra-Matic 6T70 Six-Speed Automatic Delivers Performance and Fuel Economy".TheAutoChannel.RetrievedJanuary 20,2006.
• "Technologically Advanced Transmissions Enter GM Fleet".AutoTrends.Archived fromthe originalon June 25, 2008.RetrievedJune 3,2008.