Should You Shift to Neutral at Red Lights in an Automatic Car?
3 Answers
When waiting at a red light in an automatic car, it is recommended to shift to neutral (N). If the wait is prolonged, you can also engage the handbrake. Of course, you can briefly shift to N during short stops. However, leaving it in N for extended periods can damage the vehicle, particularly the transmission. More details about gear shifting in automatic cars are as follows: 1. Keeping the car in D while pressing the brake at a red light is akin to pressing both the accelerator and brake in a manual car. This increases fuel consumption. The torque converter remains under stress for a long time, accelerating wear on components like the torque converter. 2. It is not advisable to shift to P at red lights. First, shifting to P without engaging the handbrake can damage certain parts. Second, starting from P involves cumbersome steps. Third, frequent shifting to P can cause gear grinding in the automatic transmission, damaging its bearings. 3. The correct method is: press the brake, shift to N, switch to D when the light turns green, and start driving.
When driving, I pay special attention to the operation techniques of automatic transmission vehicles. Regarding whether to shift to neutral (N) at traffic lights, it depends on the specific situation. For short waits, such as red lights lasting ten or twenty seconds, I recommend staying in Drive (D) with the brake pedal firmly pressed. This way, you can release the brake and go as soon as the light turns green, which is convenient and hassle-free. Modern transmissions are well-designed, with torque converters having slight slippage at idle, which does not cause excessive wear or damage to oil seals. Shifting to neutral (N) would only add unnecessary steps and delay your start, especially in crowded intersections where it might prompt honking from cars behind. For longer waits exceeding one minute, shifting to N can reduce the load on the transmission and prevent heat buildup in the engine, though the impact on fuel consumption is negligible. Remember, never shift to N on slopes, as the vehicle may roll, posing a safety risk. I've also noticed that many cars have auto start-stop systems, eliminating the need to shift when the engine automatically shuts off. In summary, for a balance of convenience and vehicle protection, staying in D with the brake pressed is the norm.
Shifting to neutral at red lights? I don't do it often. As someone who frequently drives automatics, I believe the point is convenience. When stopped at a red light, I usually just keep my foot on the brake without shifting gears - this keeps me ready to go at any moment with much quicker reaction time. Shifting to N feels unnecessary; if I forget to shift back to D when the light turns green, the delayed start might earn me some honks - how embarrassing! Technically speaking, short idling in D gear is fine, the transmission lubrication system can handle it. If you really want to use N, it's only suitable for extremely long waits like traffic jams, but the fuel savings are negligible. Safety-wise, N gear is riskier on slopes or slippery roads where the vehicle could slide. I've seen many drivers panic in such situations. Keep it simple - D gear is sufficient, combined with the handbrake if waiting too long. But with frequent traffic light changes, there's really no need to complicate things.
