Truckasaurus Lives: Players with an active
vehicle in play may spend 3 audience
votes, whenever they would ordinarily be
able to spend votes, in order to activate
the Truckasaurus. When it activates,
the Truckasaurus counts as being in the
same gear as the current gear phase. This
activation occurs before the active players
activation (if they were about to activate a
vehicle). The Truckasaurus may be activated multiple times in a single gear phase.
So, I think it’s only active for the gear it’s activated in. It has no “gearing” of its own.
What it does with that gearing…I don’t honestly know. I’m still reading and trying to parse the rules intent myself.
The gear is important to determine what maneuvers Truckasaurus can perform. You activate it very early or late in a turn, your maneuvering options floor getting the beast closer to enemy cars than your own might be limited.