2. Because large trucks need more power when they start at low speed, they can shift to 1 gear when they start. In the process of high-speed driving, you don't need much power, you can change the gear to high gear.
3. Precautions: Look down at the shift lever when shifting gears; Driving at low speed for a long time. Generally speaking, high gear.
It's more fuel efficient than low gear. Therefore, it is necessary to upgrade in time after starting; When shifting gears, the clutch can't step on the bottom, resulting in gear damage. In addition, when the clutch is not used, don't put your feet on the clutch, which will cause excessive wear of the release bearing.