Yeah whenever I have 3 or 4 people including myself in the car I hear a grinding/scraping metal noise when I'm driving at low speeds from either the botom of my car or on the wheels. I'm not sure, if I go faster and pick up speed the noise seems to dissspeared but if I hit a bump or something il hear the noise briefly it's only when I got 3 or more people tho cause if its just me driving or I got 1 another person with me I don't hear anything I tried checking underneath the car and couldn't see anything that got messed up. The exhaust hanger are fine So it ain't my exhaust hittin it. OnlythIng could guess is maybe the cat was. But anyways could it be that my springs and struts are going bad Wat do u guys think?

 

Yes your springs shocks & struts are obviously weak. Renewing all that would help.

The scraping is most likely the drive shaft rubbing on the parking brake cables or something along those lines.