Personally I never had this happen. I am assume it's making a sound when you're stepping on the gas pedal. Since you replaced everything on the outer end it leads me to believe that the noise is coming from the rear pumpkin. You possibly have a chipped tooth in one of the gears in there . You could try raising it off the ground and turning the wheel slowly trying to feel for a tight spot or even a loose spot or maybe hearing something. If you do get something like that chances are it is in the rear end .