grinding noise

Hey does anybody have any clue what this weird buzzing/grinding noise is that I hear when I’m at a lower speed and I let off the gas? I also here it at the beginning of acceleration but it then disappears once at a higher rate of speed

For some time now I have noticed that there’s a feeling like something is rubbing (or grinding) when I reverse and my steering wheel is turned pretty hard in either direction. I sometime notice this when I am in drive and again, with the steering wheel is turned hard in either direction and when...