AFTER GETTING MY MOUNTAINEER BACK FROM ACCIDENT RELATED REPAIRS I NOTICED THAT WHILE BACKING &/OR TURNING THERE WAS A POPPING SOUND FROM THE FRONT OF THE VEHICLE. ONE OF THE CONTROL ARMS WAS REPLACED DUE TO THE ACCIDENT, THE OTHER ONE WAS REPLACED IN 9/1999 & THE VEHICLE IS MAKING THE POPPING SOUND AGAIN.