How many of us are there? Owners of Dodge based RV's?

Griff in Fairbanks wrote:
toedtoes - you probably have a blocked vent or vent hose. Fuel fill nozzles rely on air back pressure to sense when to shut off. A blocked vent/hose would increase sensed back pressure, causing the nozzle to shut off before it should.

If your motorhome has a fuel vapor capture/reclamation system, the charcoal canister is plugged, worn out, or malfunctioning. This is why the canisters are often disconnected.