
Automatic transmission's "D+" and "D-" refer to the manual mode of the car. When the gear is in D position, moving the gear lever to the left or right can switch to manual mode. In manual mode, gear shifting is performed by operating "D+" and "D-". Pushing towards the "D+" direction increases the gear, while moving towards the "D-" direction decreases the gear.

I've been driving automatic transmission cars for years and often use the D+/- mode to control the gears. The switching method is straightforward: on the gear lever, push from the D position towards the direction marked + or -, usually to the right or forward. Some models require a light press of the side button to unlock. A single push changes the gear, and the dashboard will display the current gear. This feature is particularly useful for mountain driving, such as pushing the - sign to downshift before descending a slope to use engine braking, reducing the need for brakes to avoid overheating; or pulling the + sign to upshift for smoother acceleration after overtaking on flat roads. There's no need to press the accelerator or brake when switching gears; just push the lever directly. Be mindful of matching the vehicle speed and RPM, otherwise, the transmission may jerk or consume more fuel. Personally, I think with more practice, it becomes second nature. Beginners should test it a few times in low-speed areas for safety.

As a daily driver familiar with cars, I always use the D+/- function when manually shifting gears. The operation is simple: push the gear lever from the D position towards + for upshifting or - for downshifting, or activate it by pressing a button. Once shifted, the onboard computer senses the signal and adjusts the gear ratio. I often use it in city traffic to flexibly control speed and reduce gear-shifting shocks. The benefits include saving brake pads and extending the lifespan of car components; however, it's important to avoid shifting in the redline zone to prevent engine overload. Before and after each drive, check if the gear lever moves smoothly to ensure it doesn't get stuck or become loose, which could affect driving safety. This manual mode offers better control, making it suitable for complex road conditions.

Shifting to D+/- is very simple: after starting the car and engaging D gear, just push the gear lever to the + or - zone. Push + to upshift for acceleration, push - to downshift for deceleration, and it takes effect immediately. I mainly use it to control speed on uphill and downhill slopes to avoid excessive brake wear. It's convenient and effortless to switch a few times during daily commutes. Remember, it's safest to operate when the vehicle speed is stable—avoid forcing shifts at high RPMs.

I particularly enjoy the D+/- function while playing with cars, as the switching is super easy: just push the gear lever to switch to manual mode, and the dashboard lights up with the digital gear number. For example, with the steering wheel paddle shifters, pulling the right side upshifts and the left side downshifts, simulating a racing feel. On the track or steep slopes, manually downshifting to control speed is incredibly satisfying! Before switching, ensure the road conditions are clear, and beginners should first familiarize themselves with the rhythm to avoid jerking. This method extends the transmission's lifespan and saves fuel, adding a bit of fun to daily commutes.

To switch to D+/- mode, simply push the gear lever from the D position towards the + or - direction to activate manual shifting. After switching, promptly upshift or downshift to match the vehicle speed, otherwise the engine may produce abnormal noises. I often use it when driving in the rain: downshifting on downhill slopes prevents skidding, and using less braking makes it safer. Precautions: First, read the car manual to understand the design; avoid distracted shifting on high-speed crowded roads; regularly maintain the transmission system to ensure responsive performance to driving needs. Manual control enhances vehicle flexibility, but beginners must practice at low speeds to adapt.


