
An automatic transmission car should not be shifted to neutral while driving. Here are the relevant explanations: 1. If the automatic transmission is shifted from D (Drive) to N (Neutral) while the vehicle is in motion, it can damage the automatic transmission. 2. When the vehicle is moving at high speed, both the engine speed and the output shaft speed of the automatic transmission will be very high. Shifting to N (Neutral) will disconnect the connection between the engine and the wheels, and the hydraulic lines inside the automatic transmission will experience insufficient oil pressure, preventing proper lubrication of the transmission. This leads to an increase in the internal operating temperature of the transmission and greater friction pressure. Additionally, it can damage the friction plates inside the transmission.

I've been driving for decades and seen too many novice drivers think shifting to neutral in an automatic transmission car saves fuel—it's really not a good idea. I remember a friend trying it on the highway once; the car suddenly lost power, the engine revved loudly, and it was terrifying—not to mention nearly causing a rear-end collision. Automatic transmissions are intricately designed, and shifting to neutral at high speeds causes the engine to rev too fast, accelerating wear and potentially damaging drivetrain components. My advice? Unless towing or parking, just stay in Drive (D). Safety first—engine braking helps a lot when coasting downhill. Don’t risk big trouble to save small money. Develop good habits for safer driving and a longer-lasting car.

With over a decade of car repair experience, I often encounter customers needing transmission repairs due to shifting into neutral while driving—it's just not worth it. Automatic transmissions on hydraulic systems, and suddenly shifting to N while moving causes abrupt oil pressure changes, leading to gear jamming or overheating, potentially costing thousands in repairs long-term. Especially at high speeds or on slopes, sudden loss of power may cause loss of control, forcing harsh braking and added strain. Some manuals permit brief N use (e.g., towing), but risks remain high—always check your vehicle’s manual. Remember, transmissions are precision components; treating them right saves hassle and money. For daily driving, staying in D is safest.

I've been driving an automatic transmission car for three years now. Out of curiosity, I once tried coasting in neutral to save fuel, but the car suddenly decelerated, and the engine noise was terrifyingly loud. It almost caused an accident in traffic. Since then, I've never touched the N gear again. Such operation may significantly increase engine load, accelerate wear, and potentially damage the control system. Modern car designs emphasize convenience, but the sport mode or manual mode are sufficient. As an ordinary driver, safety comes first—don't risk trying these tricks.

Having focused on driving safety for years, I must warn that shifting to neutral while driving an automatic transmission poses extreme risks. It instantly cuts off power, causing abnormal deceleration or loss of control, especially when going downhill where engine braking is absent, increasing the likelihood of skidding. In reality, many accidents stem from this practice—not only is repair costly, but it may also violate laws and regulations. When teaching my child to drive, I repeatedly emphasize proper gear usage: neutral should only be used when parked or in special circumstances. Cultivating good habits and utilizing intelligent driving modes far outweighs last-minute risky maneuvers for safe driving.

As a car modification enthusiast, I've experimented with various techniques, including coasting in neutral to save fuel. The results showed that shifting to N gear at high speeds in an automatic transmission indeed causes the engine to idle aggressively, increases wear, and removes braking support, overloading the brake system. Once while driving on a mountain road, it nearly caused an accident. Modern cars may allow this in specific modes, but it's better to use cruise control or eco settings instead. Modifications can be fun, but not at the expense of safety; I recommend focusing on vehicle and upgrades, as true car enthusiasts value stable performance more.


