As the title says, not sure what’s going on basically replaced the whole rear on the passenger side, but when I drive more than a mile I hear a loud rubbing noise coming from the rear sounds like a train. And it gets louder the faster I go.

Not sure what’s causing this ?

 

Is new hardware including new wheel cylinders? Did you check the wheel bearings?

 

does it change when you press the brakes or softly apply the ebake?