2003 Pontiac Sunfire Hear Loud Grinding Noise Reversing Car S Standard

I hear a loud grinding noise when reversing in my car. It`s a standard, it happens with, or without the clutch in. I replaced the break pads and routers only a few months ago. It also happens when in any other gear, just not as loudly. The noise is heard more when inside the car, than on the outside of the car.. No clue what it could be.. HELP! :(