Can You Shift to Neutral (N) While Driving an Automatic Car?

[DelGia]

It is not permissible to shift into neutral (N) while driving an automatic car. Firstly, doing so is hazardous, and secondly, it can damage the automatic transmission. Therefore, it is advised that car owners avoid this practice. Whether it's an automatic or manual transmission, coasting in neutral is not recommended. There are three common types of automatic transmissions in vehicles: dual-clutch transmission (DCT), continuously variable transmission (CVT), and automatic transmission (AT). The dual-clutch transmission is a product developed based on manual transmissions, and its structure is quite similar to that of a manual transmission. DCTs are known for their fast shifting speeds and high transmission efficiency. The CVT is a relatively simple automatic transmission in terms of structure, and it is commonly used in most Japanese cars.

[StJohn]

Having driven a taxi for over twenty years, what scares me the most is seeing drivers coasting in neutral at intersections. Never shift to N (Neutral) while driving an automatic transmission vehicle! First, it's dangerous as the car loses power response, making it impossible to avoid sudden emergencies. Second, modern vehicles use electric pumps for lubrication; coasting in neutral leads to insufficient transmission oil pressure, which can easily grind metal shavings off the gears. Last year, my apprentice didn't heed my advice and coasted in neutral while waiting at a red light, nearly causing a rear-end collision with a bus behind him. It scared him so much he never did it again. Especially don't use neutral when going downhill—it puts too much strain on the brakes. I've seen people's brake pads smoke, forcing them to call for a tow. Remember, as long as the wheels are turning, honestly keep it in D (Drive).

[DiClaire]

On the expressway, if you see the car ahead suddenly brake lights on but slow down very slowly? It's likely in neutral gear. The transmission suddenly cuts off the power chain, and the car slides forward like a runaway horse, with the throttle completely unresponsive. I once tested shifting to N at 60km/h, the tachometer soared when I pressed the gas but the car didn't accelerate at all, which was really scary. Although manufacturers say occasional accidental shifts are fine, CVTs with steel belts are especially vulnerable to this. A mechanic told me that coasting in neutral for more than two minutes can heat the transmission up to 90°C. Now in traffic jams, I just keep it in D with auto hold—easy and safe.

[DelKeira]

A friend who studies mechanics told me that coasting in neutral (N) gear in an automatic transmission is like making the gearbox "work while sick." When the hard connection between the engine and wheels is disconnected, the hydraulic oil circulation slows down, and those precise planetary gears end up grinding dry. Especially on long downhill slopes, I've seen people shift to neutral to save fuel, only to overheat the brake discs, causing brake failure and a collision with the guardrail. Although the onboard computer provides protection, it's like holding your breath while diving—there's always a limit. While driving, it's best to stay in drive (D) gear. If you really need to park for more than thirty seconds, then shift to park (P) and engage the handbrake.

[KhloeMarie]

Last week, my neighbor had to overhaul the transmission of his new car because he shifted to N gear every day on the viaduct to 'save fuel.' In fact, for fuel-injected cars, the engine control unit automatically cuts off the fuel supply when you hold the brake in D gear, which actually saves more fuel. The danger of coasting in neutral is that once the power is interrupted, you lose the chance to make an emergency maneuver in sudden situations. Once on a rainy highway, a logistics truck suddenly dropped its cargo box ahead of me—if I had been in neutral, I would have definitely crashed into it. Remember three things: always keep your foot near the brake and press it directly in emergencies; use the start-stop function for stops longer than five seconds; and use L gear to lock the transmission when going down steep slopes.

[DeCooper]

The driving instructor taught us: the N gear in an automatic transmission is like a temporary dockworker, only to be used when the vehicle is completely stationary. Shifting into N gear while driving is equivalent to removing the safety lock of the transmission. From personal experience, accidentally shifting into N gear once caused the car to suddenly jerk as if being pulled back, and a yellow gear warning light appeared on the dashboard. Later, the 4S shop said such shocks could lead to premature wear of the torque converter, and replacing it would cost over eight thousand. Want to save fuel? Turning on ECO mode is a hundred times more reliable than shifting into neutral. There's really no need to fiddle with the gears in the city; just stick with D gear for everything.