The General Motors 6T50 6-speed automatic transmission was produced from 2010 to 2019 and installed in front-wheel drive models under the MHK designation and all-wheel drive models under the MHJ designation. In some markets, this automatic transmission is best known as the Opel Antara and Chevrolet Captiva transmission.
Specifications
| Type | automatic transmission |
| Number of gears | 6 |
| Type of drive | front / all wheel |
| Engine volume, l | up to 3.0 |
| Torque output, Nm | up to 350 |
| Recommended oil | DEXRON VI |
| Oil capacity, liter | 8.2 |
| Partial replacement, liter | 5.0 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~250 000 km |
| Weight, kg | 86.3 |
Gear ratios GM 6T50
Using the 2012 Opel Antara with a 2.2 CDTi diesel engine as an example:
| Main | 2.89 |
| 1st | 4.584 |
| 2nd | 2.964 |
| 3rd | 1.912 |
| 4th | 1.446 |
| 5th | 1.000 |
| 6th | 0.746 |
| Reverse | 2.943 |
Using
The transmission was installed on:
- Buick Envision 1 (D2XX) in 2014 – 2017;
- Buick GL8 2 (SGM258) in 2010 – 2017;
- Buick Regal 5 (GMX350) in 2011 – 2017;
- Buick Verano 1 (D1SB) in 2012 – 2016;
- Chevrolet Captiva 1 (C140) in 2011 – 2018;
- Chevrolet Malibu 8 (V300) in 2013 – 2016;
- Opel Antara A (L07) in 2010 – 2015.
Disadvantages of the GM 6T50 gearbox
- The most well-known weak point of the automatic transmission is the spring disc of the 3-5-R drum;
- If it fails, not only the drum is damaged, but fragments of the disc fly throughout the transmission;
- Replacing it with a reinforced original does not help, and there are non-original solutions;
- Cases of differential bolts coming loose have also been described on specialized forums;
- All remaining problems are related to overheating or solenoids failing.
