I'm not sure when they stopped putting baffles in the tanks. The reason they did was to minimize the fuel slosh & erratic fuel gauge readings. The baffles in my 38 are fastened to the bottom of the tank with the top inch or so being open & small openings in the bottom for fuel flow. They create a small chamber in which the sending unit lives. If for some reason one of the chamber walls moved slightly at the top (broken spot weld, rust weakened,?) it could keep the fuel stationary at lower levels yet allow excess movement at fuller levels. Just a thought that's fairly easy to check with a mechanic's mirror & small light through the sending unit opening. It doesn't seem REAL likely but it is possible. I would think if it was a loose electrical connection or short it would happen at all fuel levels.
