
When a car is in neutral gear, it will not move. It requires engaging a gear and applying throttle to move. When driving a manual transmission car, it is essential to press the clutch pedal quickly and fully to the floor during gear shifts to ensure smooth shifting. Neutral gear typically refers to the state where the vehicle's gear lever is not engaged in any forward or reverse gear, completely disconnecting the transmission from the drive wheels. Additional notes on precautions for using car engines are as follows: 1. Avoid driving in neutral gear: The engine itself has a fuel-cut function during deceleration, and driving in neutral may actually be less fuel-efficient. 2. Check for oil leaks: When using the vehicle, pay attention to any oil on the ground to determine if there is an engine oil leak. Communicate promptly with the car's 4S dealership to eliminate potential safety hazards. 3. For cars equipped with turbochargers: After high-speed driving or climbing, do not turn off the engine immediately. Let it idle for about 10 minutes before shutting it down. Turbocharged cars accumulate carbon deposits several times faster than naturally aspirated cars. 4. Brake fluid contamination: If water gets mixed into or absorbed by the brake fluid, or if impurities or sediments are found in the brake fluid, it should be replaced or carefully filtered immediately. Otherwise, it may lead to insufficient braking pressure, affecting the braking performance.

From my personal experience of driving for twenty years, a car generally won't move by itself when in neutral gear because the connection between the engine and the wheels is cut off, preventing power transmission. However, if parked on a slope or given a push, the car might slide. Once during a mountain trip, I forgot to engage the handbrake and only put the car in neutral—it actually rolled backward a few meters, nearly hitting a tree, which gave me quite a scare. Therefore, it's always safer to engage the handbrake or shift into drive to block the wheels when parking. In automatic transmission cars, putting the car in neutral also causes the transmission to idle, serving no practical purpose unless towing or repairing. Developing good habits, like checking if the ground is level, can prevent minor accidents, and driving safety is a top priority.

When I first started learning to drive, I was also quite worried about whether the car would move in neutral gear. Now I understand: no matter how fast the engine runs, as long as the gear is in neutral, the power won't be transmitted to the wheels, and the car will stay put. However, slopes are a variable—gravity can make the car slide. I learned this the hard way during driving school practice when I forgot to pull the handbrake, and the car gently moved a short distance, earning me a scolding from the instructor. For manual transmission cars, neutral is more common, like when briefly stopping at a red light to save some fuel, but automatic transmission drivers need to be careful not to misuse it. It's best to use the foot brake in combination; after stopping, the engine keeps running normally, but the wheels don't engage. New drivers will get the hang of it after a few more practices—never overlook the small details to ensure driving safety.

As an experienced auto mechanic, here's a simple explanation: The transmission design ensures that in neutral gear, the engine and wheels are separated, power transmission is interrupted, and the vehicle won't move on its own. Whether manual or automatic, the principle is similar to gears disengaging. However, the car may slide under external forces like pushing or gravity, especially on slopes when tire friction is insufficient. In daily driving, use neutral only for towing or emergency repairs, and avoid shifting while moving to prevent component damage. Maintenance advice is to regularly check the brake system and transmission to prevent minor issues from becoming major problems.


