I had the TSB on the rear differentail and limited slip done about 4 months and 15k miles ago. I was fine, but I notice that the chatter is starting all over again, just as it did the first time.
I think that they did everything at the shop. They did not use an additive because they went with a synthetic oil. I think that this is not right, the bulletin says to add the modifier.
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company