[Fred A]

So, what was the first question? Read it again and clarify. I doubt that the factory went through the care and measurment that we must because of doing so many by feel with repeatable parts supply as in a factory. The mix of parts, damage by years of poor service and various bearing suppliers makes it a bit tougher to get it right without being very cautious. The popular preload recommendations seems to be around 20 IP. Don't chase any threads if possible. Years ago when I knew far less I would take a low mileage component and replace the gaskets, feel the bearings to an expected preload and go... Recent A rears that I have seen have been obviously redone to unknown standards. The safety wire job is most obvious clue. Read the article by Tom Endy at the Orange As site for a wonderful explanation. Good Luck: Fred A