What is the S gear in an automatic transmission?

[WyattAnn]

Automatic transmission S gear is the sport mode of a car. Many automatic transmission vehicles are equipped with an S gear, and some high-end models of A-segment cars also feature an S gear design. In S gear sport mode, the transmission can shift freely, but the shift timing is delayed, keeping the engine at high RPM for a longer period. This allows the car to maintain low gear and high RPM for an extended duration, resulting in greater torque output and acceleration. The S gear only delays upshifting without altering other operational aspects, which inevitably increases the load on the transmission in the short term, raises the temperature, and accelerates wear. Therefore, it is advisable to avoid prolonged use of the S gear. For cars frequently driven in congested urban areas, where engine carbon buildup is more common, periodic and appropriate use of the S gear can help remove carbon deposits, improve fuel economy, and extend engine life.