What does the plus and minus on an automatic transmission mean?

[CorbinFitz]

Automatic transmission vehicles have plus and minus signs on the gear shift, which represent gear changes. The plus sign indicates upshifting, while the minus sign indicates downshifting. If you want to increase the vehicle's speed, you can push the gear shift towards the plus sign; to reduce the vehicle's speed, you can push the gear shift towards the minus sign. Below is more information about automatic transmission vehicles: 1. Definition: Generally equipped with an automatic transmission (AT) to regulate speed, an automatic transmission vehicle automatically selects the appropriate gear based on engine speed and load through the transmission control system while driving. 2. Gear introduction: Common automatic transmission vehicles have several gears, including P (Park), R (Reverse), N (Neutral), and D (Drive). Some vehicles are also equipped with an L gear (Low gear).

[VonJuniper]

I've been driving automatic transmission cars for many years. The plus and minus symbols on the gear shift actually represent the manual mode settings, making driving more flexible. The plus sign indicates upshifting, while the minus sign indicates downshifting. Unlike full automatic mode where the computer controls everything, this allows drivers to actively intervene when needed. For example, when climbing steep slopes, I often push the minus sign to downshift, which increases engine RPM and provides ample power, making the climb effortless. On long descents, I also use the minus sign to utilize engine braking, reducing the frequency of brake pedal usage and protecting the brake pads. When overtaking or trying to save fuel, timely upshifting can also optimize performance. This feature originated from the evolution of automatic transmissions, combining the advantages of manual transmissions without the cumbersome operation. It's particularly suitable for areas with complex road conditions, and I recommend trying it out a few times to get familiar with it.

[EmersynFitz]

From the perspective of vehicle engineering, the gear-shifting function of automatic transmissions is essentially an extended design that simulates manual shifting, aimed at enhancing safety and efficiency in specific scenarios. I often describe it as adding an intelligent switch to the automatic transmission, controlled via paddle shifters on the steering wheel or symbols on the gear lever. The core function of upshifting and downshifting is to regulate engine speed and torque output. For example, downshifting during snowy conditions prevents wheel slippage, while downshifting on continuous downhill slopes provides engine braking to avoid brake overheating. This design also indirectly protects the transmission by reducing excessive wear. Many modern vehicles feature a sport mode that works in tandem with gear-shifting, allowing drivers to enjoy the thrill of control while maintaining the convenience of automatic transmissions, striking a balance between safety and enjoyment.

[AngelaAnn]

If you're new to driving an automatic car, don't be nervous when you see the plus and minus signs on the gear shift. Simply put, the plus sign allows you to manually shift up, and the minus sign lets you manually shift down, which is a semi-automatic function. It gives you more control in specific scenarios, such as pushing the minus sign to downshift for stronger engine torque when accelerating to overtake, or upshifting for smoother and more fuel-efficient driving at low speeds. After using it a few times, I found it easy to get the hang of. Beginners can start practicing in low-speed zones, and once familiar, it can boost overall driving confidence and help avoid unexpected situations.