What is the function of the N gear in an automatic transmission?
2 Answers
The function of the N gear in an automatic transmission is to disconnect the power transmission between the input shaft and the output shaft inside the transmission. This prevents prolonged pressing of the brake pedal, which can cause the transmission fluid temperature to rise, leading to fluid degradation and affecting the transmission's performance. The N gear in an automatic transmission stands for Neutral, and it is typically used for brief stops, allowing the right foot to be removed from the brake pedal. The gears in an automatic transmission car are divided into: P, R, N, D, S, and L. The P gear is for long-term parking, especially on slopes, where the wheels are mechanically locked to ensure the vehicle cannot move while stationary. The R gear is the Reverse gear, engaged by pressing the safety button on the gear lever and shifting to R. The N gear is used when starting the vehicle or when towing. The S gear is for Sport mode, allowing the transmission to shift freely. The L gear is for Low speed, useful on icy or snowy roads or in heavy traffic to prolong the engine's lifespan.
I've been driving automatic transmission cars for over 20 years and find the N gear particularly useful in daily driving. It stands for Neutral, just like the neutral position in manual cars, allowing the wheels to roll freely without transmitting any driving force. I most commonly use it when washing the car - car wash workers need to push the vehicle, and shifting to N gear allows safe movement; or during towing rescue operations to avoid damaging the transmission. However, it's important to note that you should never use it for parking on slopes, as without wheel lock, it can easily cause the car to roll and lead to accidents. For short stops at traffic lights or temporary parking, shifting to N gear is less strenuous than keeping it in D gear while braking, though modern cars have automatic systems to manage these situations. Overall, the N gear is designed for transitions and specific purposes, and familiarity with it can enhance convenience.
