What is the function of the S gear +/- in an automatic transmission?
3 Answers
The function of the S gear +/- in an automatic transmission is to adjust the speed when going uphill or downhill using these two buttons. The +/- represents gear adjustment: pressing + shifts the gear up, while pressing - shifts the gear down. Below is an introduction to related content: Advantages of S gear: In S gear (Sport mode), the transmission can shift freely, but the shifting timing is delayed, keeping the engine at high RPM for a longer period. This allows the car to operate at a lower gear with higher RPM for an extended time, resulting in greater torque output and acceleration. This low-gear, high-RPM approach gives the driver a noticeable sense of the car's pushback, making it easier to handle both speed changes and overtaking. Function of S gear: When descending a long slope, especially if the gradient is steep, it is recommended to use S gear to utilize engine braking, preventing the wheel brakes from overheating and reducing braking efficiency. When climbing a slope, using S gear can provide more power for the ascent.
The S gear in an automatic transmission, paired with the + and - buttons, primarily allows for more manual control while driving. I usually like to switch to S gear when needed, such as when climbing steep slopes or overtaking on highways. It delays gear shifts, keeping the engine RPM higher for more powerful output. The + sign is for manual upshifting, and the - sign is for manual downshifting, making it very convenient to use. In city driving with frequent stops or when taking turns, you can decide the gear yourself, making the car more responsive. Additionally, downshifting when going downhill provides engine braking, reducing brake wear, which is quite practical. Remember, the S gear is suitable for short-term use; prolonged use can increase fuel consumption, as the sport mode tuning is more aggressive. I think this is a must-have feature for those who enjoy a sense of driving control, but beginners may need some time to get used to the operation.
The fun of using the S gear and +/- functions in an automatic car mainly lies in the performance boost. I've tried accelerating in an open space—pushing the S gear immediately makes the throttle response faster, as agile as a manual transmission. The + button for manual upshifting avoids insufficient power caused by automatic early gear shifts, while the - button for downshifting before corners raises the RPM for more stable and safer cornering. It's especially useful when climbing hills, maintaining high torque output in lower gears. I've heard many cars now come standard with this design, integrating manual mode to let amateurs feel professional. However, it's advised not to rely too much on it for city driving—fuel consumption will be higher, but an occasional thrill is quite exhilarating.
