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What does M+ and M- mean in an automatic transmission?

2 Answers

StAlivia

07/24/25 7:58pm

M+ and M- are features found in vehicles with a manual-automatic transmission. The manual mode (M) of a manual-automatic transmission includes M+ and M-, allowing for both automatic and manual shifting. To use the manual mode, move the gear lever to the position between M+ and M-. Pushing the lever toward M+ shifts up one gear, while pushing it toward M- shifts down one gear. Additional information: 1. A manual-automatic transmission car refers to a vehicle equipped with a "manual-automatic" transmission, which combines both manual and automatic shifting modes. These transmissions have prominent +/- indicators, allowing the driver to manually switch gears by moving the lever to this position. 2. Structurally, a manual-automatic transmission is still an automatic transmission. Therefore, it retains some drawbacks of conventional automatic transmissions, such as relatively higher fuel consumption and limited modification potential. Additionally, since these transmissions are often imported, their cost is significantly higher than standard transmissions, leading to higher overall vehicle prices.

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McOmar

08/11/25 10:57am

When I used to drive an automatic transmission car, I frequently utilized the M+/M- function, which is the manual shift mode allowing drivers to manually control gear shifts. During long downhill drives on mountain roads, using M- to downshift to a lower gear enabled engine braking, reducing the need to constantly apply the brakes and preventing overheating risks—making the ride much smoother. When overtaking, M+ upshifting provided quicker acceleration and more responsive engine performance. Remember, it’s not entirely the same as a manual transmission but rather an auxiliary function that offers additional gear control on top of the D (Drive) mode. Some drivers overlook this feature, relying solely on throttle input, but using M mode can actually improve fuel efficiency. Car manufacturers designed this function to provide greater driving flexibility, especially in complex road conditions. I’ve personally avoided multiple rear-end collision risks thanks to it—a highly practical skill. From novice to experienced drivers, I always recommend friends to practice using it to boost driving confidence.

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