After i had replaced the wheel bearing, hub, brake rotor, and brake pads i notice a metal grinding sound when i drive foward, even at a slow speed i can still hear it but not as loud. The faster i go the louder it gets. However, when i reversed or when its idle its fine. What can it be?

 

Did you take the wheel off and check to see if all your screws were torques properly? I have heard a loose brake rotor can make a grinding sound.

 

It could be your dust shield scraping against the rotor.

 

That solved it but now on my passenger front side it has a clicking metal sound when i drive. The sound is similar like newtons ball balance.