Why does the car still move when in N gear?

[KaydenLee]

The car still moves when in N gear because the brake is not pressed or the handbrake is not engaged. The N gear is one of the three standard gears in automatic transmission vehicles, located between the R gear and D gear on the gear shift console. Its essence is the neutral gear in the transmission, designed to cut off the power transmission between the input shaft and the output shaft inside the transmission. Therefore, when parking in N gear, it is essential to engage the handbrake. Below is an introduction to the gears of an automatic transmission car: 1. L gear: Low gear, which limits speed. When going uphill, shifting to this gear maintains a state of high RPM and low gear. 2. S gear: Sport mode, where the transmission can shift freely, but the shifting timing is delayed, keeping the engine at high RPM for a longer time, allowing the car to move at low gear and high RPM for an extended period. 3. D gear: Drive gear, used when the car is moving forward. 4. N gear: Neutral gear, used during brief stops. 5. P gear: Parking gear, used when parking; placing the gear in P gear stops the car's braking system, preventing rolling. 6. R gear: Reverse gear, used when reversing. However, the R gear can only be engaged when the vehicle is completely stopped. Engaging the R gear while the vehicle is moving slowly can cause severe damage to the car's transmission.

[DiCharlotte]

I've been driving for decades and have seen this situation quite a few times. When the car still moves in neutral gear, it's mainly because the automatic transmission hasn't completely disengaged the power, such as internal clutch adhesion or valve body sticking causing oil pressure transmission. Or the car is parked on a slope, and gravity pulls it to roll if the foot brake or handbrake isn't tight enough. I remember once parking on a downhill slope, the car still slid forward in N gear, and I quickly pulled the handbrake to stop it. Later inspection found that the transmission fluid level was too low, causing insufficient lubrication. The mechanic said older cars with severe wear are more prone to this problem. Regular maintenance should include periodic transmission fluid changes and brake system checks, recommended every two years or 20,000 kilometers. Don't take any abnormalities lightly; find a flat ground to test and confirm. If it still moves, head straight to the repair shop. Delaying repairs may burn out more parts, increasing repair costs and safety risks.

[OAndrew]

As someone who frequently tinkers with cars, I find it quite annoying when the vehicle moves while in neutral gear. The causes often lie in transmission issues, such as incomplete clutch disc disengagement in automatic transmissions or signal malfunctions in solenoid valves. Alternatively, parking on a slope without properly engaging the handbrake can lead to natural rolling. Improper modifications may also interfere with the system's control over power transmission. Conducting a preliminary check is simple: on level ground, firmly press the brake and shift to N (neutral) gear—if the car still moves, it's time for concern. Check the transmission fluid's color and level; if it appears black or is too low, it's time for a fluid change. I enjoy DIY maintenance and make it a habit to inspect brake wear indicators monthly. Regular upkeep can prevent most issues, stopping minor problems from escalating into major faults. Should any issue arise, avoid attempting a second test and immediately seek professional diagnostics for electrical circuits and mechanical components to prevent accidents.

[TylerAnn]

I've encountered similar issues. The car moving while in Neutral (N) gear is often due to the transmission not fully disengaging power internally, such as failed components like brake bands; or when parked on a slope, gravity takes effect but the brake force is insufficient. Simple solution: first, test on level ground to rule out slope influence. If it still moves, avoid driving and check if the transmission fluid level is normal—low fluid or contaminants may require topping up or replacement. Also, inspect the handbrake function. It's advisable to pay attention to these points during regular maintenance and not exceed the oil change interval. If problems persist, promptly consult a technician for repair.