The truck hauls the heavy — the vehicle that exists to carry loads. Dream-trucks concern the freight of a life: what you are hauling, what bears down behind you on the road, and the moving truck that carries a household between chapters.
Positive Resonance
Capacity for the heavy load, the household moved, cargo delivered
Shadow Aspect
The load exceeding the axle, the truck bearing down in the mirror
Nuances
Driving a full truck: hauling your accumulated freight
Truck bearing down: the heavy and unstoppable behind you