The 8-speed Mazda PM8AX-EC automatic transmission has been produced at the Japanese company’s factories since 2022 and is installed in hybrid versions of the popular CX-60, CX-70, and CX-90 crossovers. This automatic transmission features a multi-plate clutch and an electric motor in place of the torque converter.
Specifications
| Type | automatic transmission |
| Number of gears | 8 |
| Type of drive | all wheel |
| Engine volume, l | up to 2.5 |
| Torque output, Nm | up to 500 |
| Recommended oil | Mazda ATF-A7 |
| Oil capacity, liter | 8.3 7.3 in 2024 manuals |
| Partial replacement, liter | 5.0 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~250 000 km |
Gear ratios Mazda PM8AX-EC
Using the 2024 Mazda CX-90 PHEV with a 2.5-liter engine as an example:
| Main | 4.444 |
| 1st | 5.258 |
| 2nd | 3.303 |
| 3rd | 2.129 |
| 4th | 1.705 |
| 5th | 1.300 |
| 6th | 1.000 |
| 7th | 0.822 |
| 8th | 0.628 |
| Reverse | 4.034 |
Using
The transmission was installed on:
- Mazda CX-60 I (KH) in 2022 – …;
- Mazda CX-70 I (KJ) in 2024 – …;
- Mazda CX-90 I (KK) in 2023 – …
Disadvantages of the Mazda PM8AX-EC gearbox
- This automatic transmission has been plagued by numerous problems since its launch;
- A recall was even initiated due to loss of power after a sudden stop;
- There are also complaints about vibrations in a certain RPM range;
- Dealers replace the driveshaft under warranty, but this doesn’t help everyone; the problem is the transmission;
- Also, inappropriate shifting at low speeds is often noted on specialized forums.
