What does the O/D gear mean?

[SanJayce]

The O/D gear stands for Overdrive, which is the abbreviation of OVERDRIVE in English, representing the overdrive gear. It is typically used in automatic transmission vehicles without manual mode. The usage scenarios of the O/D gear are as follows: When overtaking quickly on highways: When the vehicle speed reaches 80km/h, the transmission will automatically shift to the 4th gear, especially in 4AT models, meaning the vehicle is in overdrive. If you want to overtake at this time, press the "O/D" button, and the vehicle will automatically switch to the 3rd gear, increasing the engine speed and torque, allowing for quick overtaking by pressing the accelerator. Low-speed driving in congested areas: In crowded areas, pressing the "O/D" button prevents the transmission from shifting to the 4th gear, reducing unnecessary shifts of the solenoid valve and making it easier to accelerate after downshifting. When descending long slopes: Pressing the O/D button during long descents keeps the gear between the 3rd gear, utilizing engine braking to control speed and reduce brake usage. Other gear positions are as follows: P gear: Parking means "parking." It is the parking gear used when stopping. After reaching the destination or for long-term parking, shift the lever into this position. Note: The vehicle must be completely stopped before shifting into P gear. Shifting into P gear before the vehicle is fully stopped can damage the automatic transmission. In P gear, the wheels are mechanically locked to prevent movement, especially useful when parking on slopes. Additionally, during short stops (e.g., at traffic lights), avoid shifting into P gear to prevent severe transmission damage in case of a rear-end collision. R gear: Reverse means "reverse" and is used for backing up. To reverse, press the safety button on the lever and shift into R gear. Ensure the vehicle is completely stopped before shifting to avoid damaging the transmission. N gear: Neutral means "neutral" and is also called the neutral gear. It can be used when waiting at traffic lights while pressing the brake. For longer waits, engage the handbrake and release the brake pedal. A common misconception is that shifting into N gear while coasting downhill or at high speeds saves fuel, but this is incorrect and can damage the transmission. D gear: Drive means "drive" and is the forward gear. Shifting into this gear and pressing the accelerator allows the vehicle to move. The transmission automatically shifts based on speed and throttle input. At traffic lights, you can stay in D gear while pressing the brake. For short waits, this is fine, but prolonged use can overheat the transmission fluid. S gear: Sport means "sport" and is the sport mode. In this gear, the transmission delays shifting to provide more power, typically used for overtaking. L gear: Low means "low" and is the low-speed forward gear. In this gear, the transmission stays in a low gear (equivalent to manual 1st gear) and does not shift automatically. It is used for climbing or descending steep slopes. The low gear provides high torque for climbing and engine braking for descending, reducing the need for constant braking. M gear: Manual means "manual" and switches to manual mode, allowing manual gear shifts like in manual transmission vehicles.