You can count me as another successful Lucas Oil Stabilizer user. I just finished my initial 500 mile service. I was having some pretty loud growling, mainly during deceleration, at about 30MPH and 10MPH. Drained the angle drive, and refilled it with 100% Lucas Oil Stabilizer (plus a little more extra in there by jacking up the drivers side). Also adjusted the belt tension and tracking. I can say I am 100% satisfied with the results, practically no angle drive noise anymore!