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Do Automatic Transmission Cars Need to Shift Gears?

1 Answers

MaciAnn

07/30/25 5:45am

Automatic transmission vehicles do not require gear shifting during normal driving. However, gear shifting is necessary in the following situations: when accelerating to overtake, controlling speed downhill, or driving uphill. When accelerating to overtake: The D gear may feel sluggish when rapid acceleration is needed for overtaking. In such cases, using manual mode or the S gear mode can provide stronger power. When controlling speed downhill: In D gear, the vehicle may accelerate due to gravity. To counter this, manually shift or use the S gear to lock into a lower gear using the "+-" buttons, enabling engine braking to reduce speed. When driving uphill: Since the D gear shifts at lower RPMs (around 2000 RPM), it may lack sufficient power for steep inclines. Using manual mode or the S gear to lock into first or second gear can provide higher torque for climbing and prevent the vehicle from rolling back. Precautions when shifting gears in automatic transmission cars: Avoid keeping the car in D gear during prolonged stops: During traffic jams or at red lights, many drivers prefer to keep the gear lever in D while pressing the brake pedal. While this is acceptable for short durations, it is advisable to shift to N gear and engage the parking brake for extended stops. Keeping the gear in D while stationary causes slight forward movement in automatic transmission cars. Prolonged braking to counteract this movement can raise transmission fluid temperature, leading to fluid degradation, especially when the air conditioning is on and the engine is idling at higher RPMs. Avoid coasting in neutral while driving: Do not shift to neutral while coasting, as the engine operates at idle speed in this mode. This reduces oil pump supply to the transmission, while transmission components and gears continue to rotate at high speeds during coasting, potentially causing overheating and transmission damage. Shifting to N gear when coasting to a stop at low speeds is acceptable and has no adverse effects.

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