The Opel M22 6-speed manual transmission was assembled at the company’s facilities from 2014 to 2020 and was installed in the Adam and Corsa E with a 1.0-liter and the Astra K with a 1.4-liter Turbo engines. This transmission was manufactured by General Motors and was designated M1X.
Specifications
| Type | manual transmission |
| Number of gears | 6 |
| Type of drive | front |
| Engine volume, l | up to 1.4 |
| Torque output, Nm | up to 230 |
| Recommended oil | API GL-4, SAE 75W-85 |
| Oil capacity, liter | 1.5 |
| Replacing the oil | every 60 000 km |
| Replacing the filter | every 60 000 km |
| Gearbox lifespan, km | ~250 000 km |
| Weight, kg | 31 |
Gear ratios Opel M22
Using the example of the 2015 Opel Adam with a 1.0 Turbo engine:
| Main | 3.875 |
| 1st | 3.917 |
| 2nd | 2.292 |
| 3rd | 1.556 |
| 4th | 1.167 |
| 5th | 0.930 |
| 6th | 0.759 |
| Reverse | 3.833 |
Using
The transmission was installed on:
- Opel Adam A (M13) in 2014 – 2019;
- Opel Astra K (B16) in 2015 – 2019;
- Opel Corsa E (X15) in 2014 – 2018.
Disadvantages of the Opel M22 gearbox
- This is a fairly rare manual transmission, and there’s minimal information about its failures;
- It’s generally praised on specialized forums, especially for its ease of shifting;
- A number of Astra 1.4 Turbo owners replaced their transmission under warranty at 30,000 km;
- It’s also worth noting that the lubricant volume is small, so it’s important to monitor for leaks.
