1999 Dodge Dakota R/T, 133k miles. When I stop, there is a secondary small bump that I am fairly sure is the fuel sloshing around in the tank. It isn't noticeable if the tank is full but once it gets down to around 3/4 tank it is noticeable. I can repeat at will, especially letting it creep forward and hitting the brake again. Once the tank gets lower the effect lessens. This is my fourth 1999-2000 Dakota and I've never had the issue on the other trucks, they all had the large capacity tank.
I guess it's just the design of the tank and the placement (if any) of the baffles inside but I am curious why this truck does this when the others did not. Should I buy a spare gas tank and replace it when the fuel pump eventually goes bad?