I HAD TO REPLACE ONE OF MINE BUT IT WASN'T TO BAD, YOU'LL NEED A BALL JOINT SPERATOR TO BUST THE BALL JOINTS OUT UPPER AND LOWER "IT MAKES IT EASIER". TRY NOT TO RIP THE RUBBER BOOT ON THE BALL JOINT. I DID AND SUCKED TO CHANGE. OTHER THAN THAT IT WAS JUST LIKE CHANGING BEARINGS IN WHEEL HUB. PULL THE SEAL OUT "REPLACE" THEN PULL THE BEARINGS OUT. THE NEW BEARNINGS SHOULD BE SEALED. BUT IN NEW BEARING, TAP SEAL BACK IN AND PUT BACK TOGETHER. GOOD LUCK.....