Can an Automatic Transmission Coast in D Gear?

1 Answers
RobertDella
07/30/25 1:41am
An automatic transmission can coast in D gear. D gear is a common gear in automatic transmission vehicles, designed to automatically select the appropriate gear when the car is moving forward. However, an automatic transmission should not coast in neutral for the following reasons: 1. The oil pressure output by the engine at idle is low, which can lead to poor lubrication and severe wear of components. 2. Excessive heat can cause the oil to carbonize and form sludge, clogging oil passages and resulting in insufficient oil supply and poor lubrication after normal operation. The gears of an automatic transmission are as follows: 1. P is the parking gear; 2. R is the reverse gear; 3. N is the neutral gear; 4. D is the drive gear; 5. S is the sport mode; 6. L is the low gear.
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