There are several reasons why automatic transmission commercial vehicles are less common:
Cost: Automatic transmissions are typically more expensive to manufacture and maintain than manual ones. This cost difference is significant for commercial vehicles, where cost efficiency is crucial.

Fuel Efficiency: In the past, manual transmissions were often perceived as more fuel-efficient than automatics, although modern automatic transmissions have closed this gap. For commercial vehicles that are used for long distances or heavy loads, fuel efficiency remains a key consideration.
Driver Preference and Skill: In many regions, drivers of commercial vehicles, especially trucks, are more familiar with manual transmissions. Additionally, many drivers prefer manual gearboxes because they offer more control over the vehicle, especially in challenging driving conditions like steep inclines or on highways.
Load and Durability: Commercial vehicles, particularly heavy-duty trucks, are designed for long-term, heavy-duty use. Manual transmissions are often considered more durable and better suited for the stresses of constant towing or hauling heavy loads.
Regulatory Environment: In some countries, regulations and licensing requirements for commercial drivers are based on manual transmission vehicles, making it less common for automatic vehicles to be adopted.
However, automatic transmissions are becoming more popular in commercial vehicles, particularly with advancements in technology that improve fuel efficiency, reduce costs, and make them more reliable for heavy-duty use. The trend toward automation in driving also plays a role in this shift.





