What do D1, D2, and D3 mean in an automatic transmission car?

[LeBrianna]

Automatic transmission D1, D2, and D3 refer to the low-gear modes of the transmission, which are equivalent to three gears. D1 manually locks the car in first gear, typically used for climbing steep slopes. D2 manually locks the gear in second gear, not exceeding second gear, and is generally used in stop-and-go traffic conditions. D3 locks the gear in third gear, allowing the vehicle to automatically switch between first, second, and third gears but not exceeding third gear. Additional related information is as follows: 1. D1: Similar to gears 1-2 in a manual transmission, it has the largest gear ratio and the strongest torque output, suitable for climbing steep slopes or towing other vehicles. 2. D2: Similar to gears 3-4 in a manual transmission, the gear ratio decreases, and torque output also reduces, making it suitable for climbing slopes or towing as well. 3. D3: Similar to gears 5-6 in a manual transmission, it provides moderate torque and power output capabilities. Shifting directly into D3 while driving can lower the gear to obtain high torque output for overtaking, with the advantage of minimal noticeable jerking and quicker throttle response.