yea ... i keep thinking there is something sliding around in the bed ... not a big deal but just enough to notice it. Of course it attracts your attention more once you realize its there.

 

Some years ago, I owned a 1967 F100.
You want to talk about fuel sloshing around?
The tank was located right behind the front seat INSIDE the cab!

Trucks have come a long way since then. You could certainly hear fuel sloshing around in that truck, but only if the heater motor was shut off. If it was running, you couldn't hear much anything else.