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What are the consequences of suddenly shifting to R gear while driving an automatic transmission car?

1 Answers

RuthAnn

08/31/25 8:10am

Shifting an automatic transmission car into R gear suddenly while driving will not cause serious issues. Automatic transmissions are generally designed with intelligence, so even if the driver mistakenly shifts into reverse gear, it will not result in gear grinding or damage to the automatic transmission. Even if reverse gear is intentionally engaged, the transmission computer will automatically switch back to D gear, instruct the engine computer to stop fuel injection and cut off power, and notify the driver with a warning sound. Simultaneously, the hazard lights will automatically turn on until the driver shifts back to D gear or pulls over to stop. Additional information: Below is an introduction to the functions of the gears in an automatic transmission car: 1. N gear (neutral): Neutral gear, similar to the neutral gear in a manual transmission, used for temporary parking. Another function is when the engine suddenly stalls while driving, if you want to restart the engine while moving, you need to shift into N gear. 2. P gear (parking): Parking gear, used when turning off the engine and parking or when the car is stationary. When the vehicle is stopped, you need to shift into P gear to power off, remove the key, and lock the doors. 3. D gear (drive): Drive gear, used for driving on general road surfaces, also one of the most commonly used gears. It can automatically switch to a comfortable operating state based on road conditions and vehicle speed.

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