The General Motors 2ML70 (AHS-T PRO M99) hybrid automatic transmission was produced by the company from 2008 to 2013, installed in SUVs, pickups based on the GMT 900 platform, BMW X6, Mercedes ML. The transmission is a hybrid of a four-speed AT and a pair of EVT (electric CVT).
Specifications
| Type | hybrid automatic transmission |
| Number of gears | 4 |
| Type of drive | rear / all wheel |
| Engine volume, l | up to 6.0 |
| Torque output, Nm | up to 515 |
| Recommended oil | ATF Dexron VI |
| Oil capacity, liter | 12.3 |
| Partial replacement, liter | 10.9 |
| Maintenance | every 80 000 km |
| Gearbox lifespan, km | ~350 000 km |
| Weight, kg | 170 |
Gear ratios GM 2ML70
Using the 2010 Cadillac Escalade Hybrid with a 6.0-liter engine as an example:
| Main | 3.42 |
| 1st | 3.69 |
| 2nd | 1.70 |
| 3rd | 1.00 |
| 4th | 0.73 |
| Reverse | 1.70 |
Using
The transmission was installed on:
- BMW X6-Series E71 in 2009 – 2011;
- Cadillac Escalade 3 (GMT926) in 2008 – 2013;
- Chevrolet Silverado 2 (GMT901) in 2008 – 2013;
- Chevrolet Tahoe 3 (GMT921) in 2008 – 2013;
- Chrysler Aspen 1 (HG) in 2008 – 2009;
- Dodge Durango 2 (HB) in 2008 – 2009;
- GMC Sierra 3 (GMT902) in 2008 – 2013;
- GMC Yukon 3 (GMT922) in 2008 – 2013;
- Mercedes ML-Class W164 in 2009 – 2011.
Disadvantages of the GM 2ML70 gearbox
- This is a rare hybrid automatic transmission, and information on its malfunctions is quite limited;
- In its early years, the transmission often malfunctioned, and a number of firmware updates were released for it;
- Also, on specialized forums, owners of cars with this transmission complain of oil leaks;
- The petal-type oil pump also doesn’t like long drives at high speeds;
- But the main problem here is the lack of service, spare parts, and donors on the secondary market.
