hey good luck with this! i had a rear diff that was replaced under waranty through subaru within 20,000km it was worn out. SO.... when we ripped the diff out we found out that there was no "free play"(similar to what a cluch should have correct me if im wrong) and buy his time the new part was no longer replaceable under the new waranty and even though it was because there was a fault in the instalation subaru would not replace it because they said "must be the way you drive the car" ??? Basically subaru are very reluctant to replace items that they can say is the drivers fault, good luck and let me know how u go