Transforming into an exceptionally fast and powerful armored truck, Payload is the one the Decepticons rely on to procure the money and energy they need to function on Earth. Whatever they need, wherever they need it, in their quest for the AllSpark it's Payload's job to get it to them, even if he has to smash right through Autobot lines to do it. Many of his allies would find his job boring and tedious compared to open fighting. But Payload not only understands how crucial his role is, but thoroughly enjoys it since it earns him praise for being a reliable soldier.
Both the Autobot and Decepticon armies make use of Class Beta drone units, which are heavily-armored, brutal melee fighters.