The General Motors 6T70 6-speed automatic transmission has been produced in the United States since 2007 and is used in front-wheel drive models as the M7W or in all-wheel drive models as the M7U. A rare MH2 modification is also available for the front-wheel drive Chevrolet Impala Limited PPV.
Specifications
| Type | automatic transmission |
| Number of gears | 6 |
| Type of drive | front / all wheel |
| Engine volume, l | up to 3.6 |
| Torque output, Nm | up to 380 |
| Recommended oil | DEXRON VI |
| Oil capacity, liter | 9.0 |
| Partial replacement, liter | 5.0 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~250 000 km |
| Weight, kg | 102 |
Gear ratios GM 6T70
Using the 2015 Cadillac SRX with a 3.6-liter engine as an example:
| Main | 3.39 |
| 1st | 4.484 |
| 2nd | 2.872 |
| 3rd | 1.842 |
| 4th | 1.414 |
| 5th | 1.000 |
| 6th | 0.742 |
| Reverse | 2.882 |
Using
The transmission was installed on:
- Buick LaCrosse 2 (GMX353) in 2009 – 2016;
- Buick Regal 5 (GMX350) in 2013 – 2017;
- Cadillac SRX II (GMT267) in 2009 – 2016;
- Cadillac XTS I (P1LL) in 2012 – 2019;
- Chevrolet Equinox 2 (GMT192) in 2009 – 2017; Equinox 3 (D2XX) in 2017 – …;
- Chevrolet Impala 9 (GMX211) in 2011 – 2016; Impala 10 (GMX352) in 2013 – 2020;
- Chevrolet Malibu 7 (GMX386) in 2007 – 2012; Malibu 8 (V300) in 2013 – 2016; Malibu 9 (V400) in 2015 – …;
- GMC Terrain 1 (GMT177) in 2009 – 2017;
- Opel Insignia A (G09) in 2013 – 2017; Insignia B (Z18) in 2017 – 2020;
- Pontiac G6 1 (GMX381) in 2007 – 2010;
- Pontiac Torrent 1 (GMT191) in 2007 – 2009;
- Saab 9-4X I (GMT168) in 2010 – 2011;
- Saturn Aura 1 (GMX354) in 2007 – 2009;
- Saturn Vue 2 (GMT319) in 2007 – 2009;
- Suzuki XL7 2 (GMT193) in 2008 – 2009.
Disadvantages of the GM 6T70 gearbox
- The weak point of the first transmissions was the unreliable spring disc of the 3-5-R drum;
- The design was updated in 2009, and failures have become less common since then;
- Also, automatic transmissions before 2012 suffered from a short-lived solenoid block;
- Under severe operating conditions, the torque converter often fails by 80,000 km;
- Other problems are related to clutch wear or transmission overheating.
