6t70 Transmission


The 6T70 transmission is a 6-speed automatic transmission that was jointly developed by GM and Ford. The 6T70 transmission is manufactured by GM and is used in the Malibu, Equinox, and Impala. See the full Raybestos Powertrain 6T70 transmission parts listing below. SK6T70 Transgo Shift Kit. Transgo SK6T70 Shift kit, Valve body repair kit. Top quality product that fixes common issues.Fits General Motors 6T70/6T75 2007-2012 Contains new Pressure Regulator valve, Actuator Feed Limit valve, TCC spring and EPC relief assembly.

Dave Riccio, Owner/Technician

By Dave Riccio, ASE Certified Technician, Owner of Tri-City Transmission & Auto Repair, Co-host of Bumper to Bumper Radio

CASE STUDY: 2009 Chevrolet Traverse – 6T70 / 6T75

6t70 Transmission

Our customer found information about the inherent failure of the wave plate in a particular clutch drum in his transmission. A problem we are well aware of. The failure of this particular wave plate results in the total failure of the transmission. However, in this instance our customer wanted to see if he could have the wave plate replaced before it broke, saving him thousands of dollars down the road, as well as a tow bill. We were more than happy to go along with his train of thought. We are always interested in legitimate methods to saving our customers money.

More Background on the Issue:

As a result of the myriad of premature transmission failures, GM with much pressure decided to extend the warranty on this particular transmission to 10 years and 120,000 miles. However, most fail just outside of that. The design of this particular transmission was a joint effort between Ford and General Motors. However, we don’t see the wave plate issue with Fords version of this transmission.

What is a Wave Plate:

Big sur dropbox


A wave plate is a mostly flat disc that is used in the stack up in a clutch drum. It’s a cushion (spring) for the transition when the clutch drum is applied/engaged. It is 1-2 mm in thickness a probably costs all of about $0.50 to manufacturer. However, when the wave plate fails, it becomes like throwing a handful of change down a garbage disposal. Hopefully that paints the picture in leading to the total failure of the transmission and your vehicle no longer moving.

Wave plates are used in almost all clutch drums in automatic transmission design.

In this particular transmission, known as the Hydro-Matic 6T70 and/or 6T75 the particular drum is the 4,5,6 drum. It specifically affects 3rd, 5th and reverse.

Pre-Emptive Repair:

Our customer’s line of thinking was right on the money. He had no symptoms or evidence of a problem, but, replace it before it breaks and save thousands of dollars. It’s not a matter of if, but a matter of when it will happen. With the exception of this wave plate, we found this model of transmission to be very solid and worthy of a preemptive repair. GM and Ford did a great job. However, the machining of the particular part, the wave plate, must have somehow been substandard or the control of the transmission could have somehow been different from the cousin transmission in the Ford version (6F55).

This transmission is not only used in this Chevy Traverse, it’s also used in

  • 2007-2009 Buick Enclave
  • 2008-2009 Chevrolet Equinox, Malibu
  • 2009 Chevrolet Traverse
  • 2007-2009 GMC Acadia
  • 2007-2009 Pontiac G6
  • 2008-2009 Pontiac Torrent
  • 2007-2009 Saturn AURA, OUTLOOK
  • 2008-2009 Saturn VUE

Equipped with FWD or AWD and 6-Spd Automatic Transmission, (RPO MH2, MH4, MH6, or MY9)

How We Handle it at Tri-City Transmission

6t70 Transmission Exploded View

No two set of circumstance are the same. We always start with a good diagnosis in order to verify the overall health of the transmission. If the transmission checks out healthy, sometimes we are able to access and service this wave plate without removal of the transmission. However, this is not practical or recommended in all situations depending on age, mileage, transmission performance and accessibility to the transmission in the car. This transmission is used in many different vehicles with different option packages, certainly effecting access in vehicle.

In situations where we have to remove the transmission as a whole, we are then able to verify the health of the rest of the transmission. We can replace the wave plate, address any other worn components in the transmission and provide a warranty for the transmission as a whole. This is the most ideal and still saves a ton of money.

Also Partial Failures

In this case, the vehicle has become symptomatic in 3rd gear, 5th gear or Reverse but the vehicle still drives fairly normal. In this case, that handful of loose change has not quite made it to the blades in the garbage disposal. This certainly needs transmission removal, but will still save money if they don’t wait. We can fix it before your vehicle quits moving and it gets real expensive.

2009 Chevrolet Traverse – 6T70 / 6T75 2007-2009 Buick Enclave 2008-2009 Chevrolet Equinox, Malibu 2009 Chevrolet Traverse 2007-2009 GMC Acadia 2007-2009 Pontiac G6 2008-2009 Pontiac Torrent 2007-2009 Saturn AURA, OUTLOOK 2008-2009 Saturn VUE

(Redirected from GM 6T70 transmission)
ManufacturerGeneral Motors/Ford
Body and chassis
Class6-speed transverseautomatic transmission

General Motors and Ford Motor Company cooperated in 2002 to create a new automatictransaxle, designed for transverse engine applications in cars. The companies jointly committed to investing US$720 million in their manufacturing plants to support the new transmission.

Each company will name and manufacture the transmission separately:

  • Ford builds the 6F50 and 6F55 along with the 6F35 (related to the GM 6T40 transmission) at their Van Dyke Transmission Plant in Sterling Heights, Michigan, and in the future at Sharonville Transmission in Sharonville, Ohio.
  • GM builds the 6T70, 6T75 and 6T80 at Warren Transmission in Warren, Michigan with production starting in July 2006.[1]

Ford claims the 6F50 is designed to handle 300 hp (224 kW) and 280 ft·lbf (380 N·m), while General Motors rates 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 lists the wet (with fluids) weight of the 6T70/75/80 to be between 102 kg (225 lb) and 104.7 kg (231 lb).

Ford appears not to have made a public statement regarding the 6F55's maximum capabilities, but uses it in AWD in the Taurus SHO with an engine rated at 272 kW (370 PS; 365 hp) and 475 N·m (350 lb·ft) 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 400 hp (298 kW; 406 PS) and 400 lb⋅ft (542 N⋅m).

The first application of the technology is in the 2007 Ford Edge and Lincoln MKXcrossover 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 weren’t stress relieved and could break with use. The updated wave plates are available under the followingpart numbers:

ClutchPart Number

Gear ratios:

6t70 Transmission Pdf

123456RFinal drive
4.4842.8721.8421.4141.0000.7422.882.77, 3.16, 3.39



  • 2007-2010 Saturn AuraXR (LY7 V6 Option)
  • 2007 Pontiac G6GTP
  • 2007-2009 Saturn Outlook
  • 2007-2017 GMC Acadia
  • 2008-2009 Saturn AuraXR
  • 2008-2009 Pontiac G6GXP
  • 2008-2017 Buick Enclave
  • 2008-2009 Chevrolet Equinox(Sport)
  • 2008-2012 Chevrolet Malibu(LY7 V6 Option)
  • 2008-2009 Pontiac TorrentGXP
  • 2009-2017 Chevrolet Traverse
  • 2010-2017 Chevrolet Equinox(LF1, LFW, LFX V6 Option)
  • 2010-2016 Cadillac SRX
  • 2010 Buick LaCrosse(LF1, LLT V6 Option)
  • 2012-2020 Chevrolet Impala
  • 2013 Cadillac XTS
  • 2010-2017 GMC Terrain(LF1, LFW, LFX V6 Option)


  • 2007 Ford Edge
  • 2007 Lincoln MKX
  • 2008 Ford Taurus
  • 2008 Ford Taurus X
  • 2008 Mercury Sable
  • 2009 Ford Flex
  • 2009 Lincoln MKS
  • 2009 Ford Escape
  • 2009 Mercury Mariner
  • 2009 Mazda Tribute
  • 2010 Ford Fusion
  • 2013 Lincoln MKZ
  • 2010 Mercury Milan
  • 2010 Ford Taurus
  • 2011 Ford Escape
  • 2011 Ford Explorer
  • 2012 Ford Mondeo
  • 2016 Ford Focus with 1.5 EcoBoost
  • 2017 Lincoln Continental

See also[edit]


  • 'New fuel-saving 6-speed transaxle to propel Ford Edge to head of crossover utility class'. Ford Motor Company press release. Archived from the original on October 5, 2012. Retrieved November 9, 2005.CS1 maint: discouraged parameter (link)
  • 'New Hydra-Matic 6T70 Six-Speed Automatic Delivers Performance and Fuel Economy'. TheAutoChannel. Retrieved January 20, 2006.CS1 maint: discouraged parameter (link)
  • 'Technologically Advanced Transmissions Enter GM Fleet'. AutoTrends. Archived from the original on June 25, 2008. Retrieved June 3, 2008.CS1 maint: discouraged parameter (link)


  1. ^'GM Powertrain Plans'. AutoWeek. Retrieved August 23, 2006.CS1 maint: discouraged parameter (link)
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