What do D1, D2, D3, D4, D5 mean in an automatic transmission?
1 Answers
Automatic transmission D1, D2, D3, D4, D5 are equivalent to three gears. D1 manually locks the car's gear in first gear, overriding the vehicle's automatic control. D2 manually locks the gear in second gear, not exceeding second gear, allowing the car to automatically switch between first and second gears. D3 locks the gear in third gear, allowing the vehicle to automatically shift between first, second, and third gears. More relevant information is as follows: Note 1: D1 and D2 can be used when going uphill. On steep slopes, manually setting the gear to first or second gear is similar to using a manual transmission on a steep slope. Utilizing lower gears achieves greater torque, making it easier to climb. Locking the gear has the added benefit of preventing frequent gear shifts in D mode. Note 2: The advantage of D3 is faster response when overtaking. At a speed of 80 km/h, the gear is usually in 5th or 6th gear. If you want to overtake quickly, the automatic transmission will gradually downshift from 6th to 5th, then to 4th, and finally to 3rd, which takes time. However, directly shifting to D3 immediately changes to 3rd gear, providing the fastest response. This enables instant acceleration, and after overtaking, you can shift back to D mode.
