I have a 2001 GT Convertible 4.6 L Auto. I have had this problem for the last couple years. When the car is at temp and I back up or turn left or right, I get a rubbing/Grinding noise from under the car. I did notice when I bought it that the steering column had been replaced, but no other major issues. Had both rear axles replaced a few years ago. Only other trans issue was the seal on the differential was leaking and replaced it. Any thoughts on this. Any help would be appreciated.