What are the gear shifting techniques for heavy trucks?

[TimothyFitz]

The gear shifting techniques for heavy trucks are: 1. The double-clutch method, which involves pressing the clutch once when disengaging the gear and pressing it again when engaging the gear, requiring proper coordination and quick speed; 2. The single-clutch method, where the clutch is not used when disengaging the gear but is pressed when engaging the gear, also requiring proper coordination. This method requires practice to disengage the gear without using the clutch; 3. The clutchless method, which also requires practicing disengaging the gear without the clutch. When shifting, engage the gear when the engine's revving sound is about to finish, i.e., when the revving speed drops to the lowest point.