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Can an automatic transmission car be shifted into neutral while driving?

3 Answers

EmeryMarie

07/30/25 1:15am

An automatic transmission car should not be shifted into neutral while driving. Doing so will reduce the vehicle's braking force, increasing the risk of rear-end collisions. When the car is in neutral and coasting, the connection between the engine and the drive wheels is lost, and the car moves forward solely by its own inertia. In case of an emergency requiring braking, all braking force must be provided by the brakes alone. Automatic transmission cars are easier to operate than manual transmission cars, as they automatically match gears to speed, whereas manual transmission cars require the driver to manually shift gears based on driving speed. Automatic transmission cars are more user-friendly and convenient to drive.

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OSpencer

08/15/25 6:51am

As a veteran driver with 15 years of experience, I've seen too many people ask about this. I really don't recommend shifting to neutral while driving! When you suddenly shift to N gear while the car is moving, the transmission oil pump speed drops, causing insufficient lubrication which is particularly harmful to the gear set. It's even more dangerous when going downhill - without engine braking force, you rely entirely on the brakes, and overheated brake pads can easily fail. A friend of mine once coasted downhill in neutral on a mountain road and nearly lost braking power - it was terrifying. Nowadays, most new cars have onboard computer protection systems, and forcibly shifting to neutral actually increases fuel consumption. It's fine to shift to N when stopping at a red light, but never do this while the car is moving. Don't risk damaging your entire transmission just to save a little bit on fuel costs.

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ConnorDella

10/20/25 6:04am

I've repaired many transmissions that were ruined by coasting in neutral. The structure of an automatic transmission is completely different from a manual one—it relies on hydraulic fluid to transfer power. Shifting to neutral while driving causes a sudden drop in oil pump pressure, leading to dry friction in the planetary gear set, which generates metal shavings. These shavings mix into the transmission fluid, clogging oil passages and causing clutch slippage or even burnout. A single repair costs at least three to four thousand yuan, far more expensive than the fuel saved. Modern transmissions come with temperature sensors, and prolonged coasting can trigger overheating protection, automatically locking the gears. If you must coast, keep it under 30 seconds and below 40 km/h.

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