When to Use the +- in D Gear?

[MacLola]

The following is a detailed introduction to the usage of +- in automatic D gear: 1. Use when going uphill or downhill: When frequently climbing long or steep slopes, if the automatic transmission's computer controls the gear shifting, there may be periods of gear dragging. This manifests as high gear with low speed, causing the engine to lack power and shake violently, increasing the chance of incorrect air-fuel ratio. Incomplete combustion of the mixture can easily produce a large amount of carbon deposits, and fuel consumption will also increase. Using manual mode at this time can effectively reduce the occurrence of such situations. When going downhill, avoid coasting in neutral and use the engine's resistance to reduce the burden on the braking system. Manual mode can be used to lower the gear instead of relying on the computer's speed control, appropriately lowering one or two gears to effectively assist braking. 2. Use when overtaking or starting: When overtaking, the manual mode D+ or D- of the automatic transmission can be used to manually intervene and downshift for more power. This also applies when starting, especially in racing competitions or when waiting at traffic lights.