My car is droped 3" and i've been noticing when i take speed bumps very slowly at certain angles that i hear a scrape that sounds hollow. So i went down and looked under her, and i see that the gas tank is loose? To describe my observation better, the gas tank seems to be leaning, or tilted. How can I fix this so it does not scrape against higher bumps like that? it used to not do that at all.

I own a 96 hatch