significant amount of time testing various differential and subframe bushing material. Sorry for the lack of a link. But here's how to easily find it: His screen name is sbarge, the post was made on 5/26/09 under the post heading, "Differential gear noise semi-dissertation." If I missed any of your questions or concerns, it was probably intentional because I don't like you :-) Feel free to post additional questions, text, or call me; my phone number is listed in my profile. If I can help any of you enjoy what was a fairly considerable expenditure, and an expectation of enjoying the gears, I'll certainly do my best.