What does d1d2d3d4d5 mean?
2 Answers
Automatic transmission d1, d2, d3, d4, and d5 are equivalent to different gears. Here are the specific introductions: 1. d1: It manually locks the car's gear in first gear, not controlled by the car itself. 2. d2: It manually locks the gear in second gear, not exceeding second gear, allowing the car to automatically switch between first and second gears. 3. d3: It locks the gear in third gear, allowing the car to automatically switch among first, second, and third gears, but not exceeding third gear. In reality, these gears are rarely used. Except in extreme situations, some friends might think of using first gear for uphill driving or getting unstuck to increase traction. Actually, cars are not that dumb; they won't upshift under heavy load at low speeds.
When I first started driving, I was also puzzled by these numbers. Actually, D1 to D5 are the manual gear limit functions of an automatic transmission. When in D gear, the transmission can shift freely, but shifting to D3 means the highest gear you can use is 3rd, which is suitable for mountain road overtaking to keep the RPM higher for faster acceleration; D2 limits to 2nd gear, helping to avoid slipping when starting on snowy roads; D1 locks in 1st gear, which is especially powerful for climbing steep slopes. This design was common in older Japanese cars. Nowadays, new cars mostly use paddle shifters, but the principle is the same: actively limiting gears can handle special road conditions, protecting the transmission and enhancing the driving experience.
