What are the reasons for not smoothly shifting gears?

[DeLeah]

The specific reasons for not smoothly shifting gears: 1. Premature commands: Shifting gears before the voice prompt. 2. Too fast shifting: Generally, when passing through neutral gear, a slight pause (about 0.5~1 second) is needed to allow the computer to sense the gear passing through neutral. If the operation is too fast, neutral gear usually cannot be sensed. Below are specific introductions to gear selection in different road conditions: 1. Uphill: This type of road requires high torque intervention, so you can use "D-" to downshift. However, sometimes when the power is sufficient, you also need to use "D+" to upshift to prevent power waste and damage to the engine and transmission. When encountering steep slopes, even after downshifting, the vehicle may still lack power. In this case, use the S gear (sport mode). 2. Downhill: Use "D+" to shift up to D2 or D3 gear, which can restrain the engine to achieve a braking effect. Generally, 2-3 gears are sufficient for moderate slopes, but when encountering steep slopes, pay attention to switching to 1st gear. If the vehicle starts to slide faster, use "D-" to downshift and control the vehicle.