Can You Coast in D Gear with an Automatic Transmission?
2 Answers
Automatic transmissions should not coast in D gear. Here are the correct operations for driving an automatic transmission: 1. Normal roads: There are no special requirements for the gear; you can drive normally by keeping it in D gear. 2. Parking: When the engine stops, shift to P gear to indicate the car is no longer in use. Some cars require shifting to P gear to remove the key. 3. Reversing: After pressing the brake and stopping the car's forward movement, shift to R gear. Gently releasing the brake will allow the car to reverse. 4. Waiting or driving in traffic: You can shift to N gear. 5. Highways or overtaking: You can shift to S gear. S gear is the car's sport mode, allowing free gear changes like D gear. It can also be used for climbing hills, as it provides maximum torque output and acceleration.
Having driven for over 20 years, I've gained some insights about automatic transmission coasting. Coasting in D gear is perfectly fine - the engine still helps with deceleration, making it safe and reliable. But you must never coast in neutral (N gear), as that may damage the transmission since the lubrication system doesn't work in neutral, causing dry gear friction. I remember during my last long-distance trip downhill, I coasted in D gear the whole way - it saved brake pads and was effortless. Don't believe those fuel-saving myths, safety first is the real principle. Modern cars are designed intelligently, some even have coasting modes that automatically shut off the engine, being both energy-efficient and mechanical protective. Develop the habit of keeping it in D gear while driving - that's the safest approach.