Chilo

I'm getting this scratching noise coming from the rear of the car. It sounds like when you need new brake pads but it only does it on curves, whether it's small or tight curve and at any speed. Pretty sure it’s not the brakes cause it GOES AWAY on a straight road even when I'm breaking. It doesn't do it till after driving for a while, sort of like it has to heat up. I was thinking it was the axle's bearings but what makes it weird is that it does it on both sides. Any ideas? Car has 77k miles on it.

Thanks