I live in an apartment, so the resolution of this problem will likely need to be taken care of by the apartment complex. But I wanted to see if I could find some answers and know what I am getting into first. My concern is that they will need to tear down walls and such.

Either way, to the problem now. When ever got the shower or tub faucet is turned on, a quite loud knocking or pounding can be hard directly behind the faucet wall of the shower. My bedroom is on the opposite side of the faucet wall which is really where my concern lies. Any ideas?

Not to worry! Your walls are safe. The problem is in the tub/shower valve itself. If you can tell us the type and make of the valve we can provide a solution. Is this a one handled valve? Back to you, Tom

I can not find any type of name brand displayed any where. But it is a two handled faucet. Anything else I can do to find more details for you?

I don't need a brand name with a two handled valve, ()see image) Sounds like a washer's loose. Shut the water off and open up the valve. Check and replace the washers if necessary. Good luck, Tom