Multimode Transmission (MMT) is an automated transmission which some Toyota models are equipped with. It can work in automatic and manual mode. It was introduced in 2006. It helps save fuel, improves vehicle performance and provides comfortable driving without having to constantly shift gears.
How MMT works
The Multimode Transmission (MMT) is based on a manual transmission. It is equipped with a clutch that is engaged and disengaged via an electric motor. This way, the clutch pedal does not have to be kept pressed all the time. The gear shift mechanism is controlled by two additional electric motors.
The transmission has three modes: Automatic (E), Sport (Es) and Manual (M). The former is intended for a smooth and comfortable ride. The second enables faster gear changes and thus better driving dynamics. With the third mode, the driver can decide for himself which gear he wants to engage and when.
In manual mode, gear changes are made using the shift lever. The driver shifts to a higher or lower gear by moving the lever to the “M+” or “M-” position. Some vehicle models are equipped with paddle shifters for faster gear changes.
Popular MMT-Gear
| Transmission Code | Manufacturer | Number of gears | Max. Displacement, l | Max. Torque, Nm | Drive type | Year of manufacture | Applicable models |
| C53A | Toyota | 5 | 1,4 | 200 | FWD | 2007 | Yaris XP90 |
| C50A | Toyota | 5 | 1.6 | 160 | FWD | 2006 | Corolla E150; Auris E150 |
Frequent defects of MMT-gears
| Defects | Transmission |
| Defects due to firmware errors . | C53A |
| The clutch has a short service life. | С50А; C53A |
| The transmission's electromechanical actuators fail prematurely. | C53A; С50А |