Rear end grinding noise goes away when turning right and gets louder when

[Mike]

turning left? Bearings or Diferantal? 1998 Jeep Cherokee ~ seems Rear end makes a grinding noise, when you are traveling along at varied speeds going thru a right hand curve the noise goes away almost completely, but when going to the left curve the noise is there and louder... is this differentail - bearings or Axel or a combo of all three ?