Will an Automatic Transmission Car Move Without Pressing the Accelerator?

[LeDaniel]

When an automatic transmission car is in P (Park) or N (Neutral) gear, it will not move whether the accelerator is pressed or not; when the gear is in any position other than P or N, the car will move when the accelerator is pressed and also when it is not pressed. It is important to note that an automatic transmission car should not be put in neutral, as coasting in neutral can damage the automatic transmission. The following are common misconceptions about using an automatic transmission: 1. Keeping the car in D (Drive) gear during prolonged stops: If the brake pedal is held down for a long time, it forcibly stops the car from moving forward, causing the transmission fluid temperature to rise and the fluid to deteriorate more easily, especially when the engine is idling at a higher speed with the air conditioning system running. 2. Shifting to N (Neutral) gear while driving at high speeds or going downhill: This can potentially burn out the transmission, as the transmission output shaft rotates at a high speed while the engine idles, leading to insufficient oil supply from the transmission oil pump and worsening lubrication conditions.

[DiLeilani]

I was a newly licensed driver and felt extremely nervous the first time I drove an automatic transmission car. I thought I had to press the accelerator for the car to move, so when I released the brake in the parking lot, I was shocked to see it slowly creeping forward on its own. Later, a friend explained that this is the idle crawl feature—the engine generates a small amount of power while running, which is transmitted through the transmission to the wheels, allowing the car to move slowly on flat ground. This is super convenient for reversing into parking spaces or during traffic jams, as you don’t need to stomp on the accelerator, saving effort and fuel. However, be careful on slopes, like when exiting a garage ramp—releasing just the brake might not provide enough power, causing the car to roll backward. I learned this the hard way when I almost hit a wall. So now, during practice, I always test how the car responds in different road conditions to ensure safety.

[DeJordan]

I've been driving for over a decade, always with automatic transmissions, and experience tells me that cars can indeed move forward at idle speed. When you shift to D or R gear and release the brake, the engine's power is transmitted to the drive wheels through the torque converter, allowing the car to crawl at a snail's pace of about 5-10 kilometers per hour. This is very practical in urban traffic, making it easy to follow the car in front. However, the slope has a significant impact. On a small slope, it might barely manage, but on a steep slope, you'll need to apply a bit of throttle assistance, otherwise, the car might stall or roll back. I've used this technique to avoid accidents during my mountain drives. I recommend that beginners practice more on flat ground to take advantage of crawling for both effort and fuel savings.

[DelCaden]

As a car enthusiast, I've studied why automatic transmission cars can move without pressing the accelerator: the key lies in the torque converter design of the transmission, which transfers the engine's low torque at idle to drive the wheels slowly. On flat ground, shifting to D and releasing the brake allows the car to coast a few meters automatically, thanks to the thrust from standard idle RPM. In real life, this feature helps me move slowly at the neighborhood entrance without startling pedestrians, but it's important to note that performance may become unstable when the battery is weak or in cold weather.

[BriannaDella]

I drive an automatic transmission car to commute every day, and in long traffic jams, I find that releasing the brake allows the car to creep forward slowly without the hassle of pressing the accelerator. This idle movement comes from the engine's continuous output, at about 5 km/h, which is perfect for following the queue, saving foot effort and reducing fuel consumption. However, it falters on slopes. Last time on a steep ramp at the mall, the car almost rolled back when starting, so I’ve gotten used to quickly tapping the accelerator lightly to ensure a smooth start. This trick is efficient for daily use, but you need to watch out for slippery road risks.

[VonWalker]

From a safe driving perspective, I often remind my friends that automatic transmission vehicles will indeed move forward slowly without pressing the accelerator - this is called idle crawling, where the engine outputs power to propel the car while running. On flat roads, when in drive mode and releasing the brake, the speed remains low at about 5km/h, making it suitable for low-speed scenarios like maneuvering in parking lots. However, slopes present higher risks - gradients exceeding 10 degrees may cause insufficient power and lead to rollback accidents. When teaching beginners at driving school, I emphasize using the parking brake as assistance to ensure maintaining safe control distances.