
D gear is the drive gear, also known as the forward gear, used when moving forward. S stands for Sport mode. When this gear is engaged, the transmission can shift freely, but the shift timing is delayed, keeping the engine at high RPM for a period to increase the car's power. Generally, automatic transmission cars have six gear positions from top to bottom: P, R, N, D, S, L. Here are the details: 1. P gear: Parking gear, used when the vehicle is parked and not in use. The wheels are mechanically locked to prevent rolling. 2. R gear: Reverse gear, used when reversing. 3. N gear: Neutral gear, used for temporary stops (e.g., at a red light). Note that this gear indicates neutral, and to prevent the vehicle from rolling on a slope, the brake must be applied. 4. L gear: Low gear. When going downhill or on a long slope, engaging this gear limits the car to the lowest gear (equivalent to first gear in a manual transmission car), allowing the engine to assist in braking, reducing the need for prolonged brake use and preventing brake overheating and potential hazards.

















A few days ago, I happened to research the DS gear while helping a friend check out a car. Actually, the 'S' stands for Sport mode. When you shift to DS gear, the car becomes noticeably more responsive, with the engine RPM consistently maintained at a higher level. I tried switching to DS gear when overtaking on the highway—stepping on the gas made the car surge forward instantly, packing a real punch. Of course, the trade-off is about a 10% increase in fuel consumption. For everyday city driving, the regular D gear is perfectly comfortable, but DS gear really comes in handy when you need quick acceleration or to climb steep hills. Just remember not to keep it engaged for too long, as it can lead to increased engine carbon buildup.

My car has a DS mode, and the driving experience is noticeably different. In regular D mode, the transmission shifts gears below 2000 rpm to save fuel. But when switched to DS mode, the gear shifting is delayed, keeping the revs above 2500 rpm, ready for you to step on the throttle. Last month on a mountain road, I was stuck behind a slow-moving truck, but switching to DS mode made overtaking effortless. Just remember to switch back after using it—once I forgot and drove 20 km in DS mode, and the fuel consumption increased by nearly 2 liters. With fuel prices so high, it really hurts the wallet.

Many people think that automatic transmissions only require a D (Drive) mode to handle everything, but the DS (Drive Sport) mode is actually quite sophisticated. It alters the transmission's programming logic to make gear shifts more aggressive. Specifically, the computer delays the shift timing to keep the engine in the high-power range. This results in much quicker throttle response, allowing you to pull half a car length ahead of neighboring vehicles when accelerating from a red light. My colleague used the DS mode every day for the first few days after his new car, enjoying the thrill until he saw the skyrocketing fuel consumption and reluctantly switched back to D mode.

People accustomed to manual transmissions might enjoy the DS mode because it offers a manual-like feel. The engine revs higher, delivering more direct power output. Last week during a suburban road trip, when climbing continuous steep slopes to enter the scenic area, the D mode felt underpowered, but switching to DS mode made an immediate difference—even the engine sound became deeper. However, it's worth noting that this mode should be used sparingly during the break-in period for new cars, as prolonged high-rev operation can accelerate engine wear.

The biggest difference between the DS gear on an automatic transmission and the regular D gear lies in the power response. When manufacturers set this sport mode, they increase throttle sensitivity and raise the shift RPM by about 500. I've tried it on the highway—with the same half-throttle press, the D gear takes over a second to accelerate, while the DS gear has virtually no delay. But you can't have your cake and eat it too; stronger power inevitably leads to higher fuel consumption. Especially in summer with the AC on, using the DS gear makes the instantaneous fuel consumption numbers on the dashboard skyrocket, which is painful to watch.


