73 gmc k2500 growling noise

[DemonikKamik]

HEY GUYS I HAD THIS GROWLING NOISE COME UP FROM UNDER THE PASSENGER SIDE IT SOUNDED LIKE AND IT ONLY HAPPENED WHEN I WOULD GO OVER A BUMP AND THEN GO AWAY. WELL IT GOT ME CURIOUS AND I DECIDED TO CHECK MY PASSENGER SIDE HUB AND WELL WHAT DO YOU KNOW THE REAR BUSHING LOOKS LIKE IT IS BEING STRIPPED BUT IDK WHY. ALSO THERE WAS METAL SHAVINGS FROM THE BUSHING BEHIND IT MIXED WITH GREASE. PART NUMBER 17 IN THE BLOW UP PICTURE IS THE ONE THAT IS CRACKED. DO YOU GUYS HAVE ANY IDEA ON WHAT I NEED TO CHECK THAT MIGHT BE CAUSING THIS PROBLEM AND ALSO IF ANYONE ON HERE KNOW WHERE I MIGHT BE ABLE TO BUY THAT PART INDIVIDUALLY. INFO ON THE HUB IT IS A SPICER MODEL 44 EXTERNAL HUB. THANK YOU ALL IN ADVANCE