I know kind of off topic, but my 02 f250 sat real close to the top overloads, and when I'd hook up my 24' enclosed car trailer, it sat the truck just on top of them. Terrible when there was no weight in it, throw 5k in the trailer and it rode perfect. When I lifted the truck, I put airbags because those stiff ass bone jarring 6" lift springs sagged like a 1/2 ton when loaded. But..there was no overload spring jarring, when I lowered the truck back down, I ordered the spring packs without the top overload, and it was perfect, rather I hadthe empty trailer, or was grossing 25k with 75psi in the bags. I kinda learned to hate those little bastards for a plusher ride when pulling an empty trailer. My '00 didn't have overloads on top, and honestly, it seemed to be able to take more weight than my 02 could before it would sit on the bottom overload.