Do You Need to Press the Brake When Shifting from D to S Gear?
2 Answers
Shifting from D to S gear does not require pressing the brake. Situations where you need to press the brake when shifting gears are as follows: 1. Shifting from P gear to any other gear requires pressing the brake. This is a safety feature to ensure driving safety. Otherwise, when shifting from P to R or D, the car immediately gains backward or forward driving force. The handbrake alone may not be sufficient to stabilize the car, which could lead to danger. If the accelerator is accidentally pressed at the same time, even pressing the brake afterward might sometimes be too late, easily causing accidents involving people or facilities. 2. D-N, R-N: When shifting an automatic transmission car from D or R gear to neutral, it is best to bring the car to a complete stop before operating, during which the brake should be pressed. This is because the gear positions in an automatic transmission are controlled by the clamping and releasing of one-way clutches. Different gears in an automatic transmission are achieved through planetary gear mechanisms, where locking the planetary gears, sun gear, or planetary carrier with gear clutches results in different gear positions. Gear clutches consist of multiple friction plates and pressure plates, with the friction plates connected to the planetary gear mechanism and the pressure plates connected to the transmission housing.
My fifteen years of driving automatic transmission experience tells you that shifting from D to S doesn't require braking at all! Watch how I usually overtake by directly flipping the gear lever - the transmission is smart enough. Sport mode is designed for instant switching, manufacturers already considered dynamic shifting needs during design. But be aware that suddenly shifting to S at very high speeds will make the engine abruptly rev up, causing a sudden jerk. Recommended to shift below 80km/h for smoother transition, and remember to turn off adaptive cruise control first. Actually, shifting to S during rainy day overtaking is particularly effective, as delayed upshifting helps reduce wheel slip.
