Well, had the rear oil changed at 45,000. Now just changed oil again to Lucus Syn oil at 92,000 after dealing with chatter since first oil change. I didn't know what the culprit was, but now I understand about the modifier or Syn oils. Immediately chattering was gone after the change, but a few days into it, it's back. Errr, may need to add some modifier to the Lucus Synthetic oil.

 

Use Ford modifier.

 

Mines doin it to inly when I turn right and gun it tho. I added ford modifier and Valvoline synthetic didn't help.