I’d recommend calling Ford customer service and request that they send out an engineer. Clearly the dealer is struggling with the diagnosis.Nothing fixed after the turbo was replaced. They waited on a catalytic converter (thinking it was damaged or something), replaced it and got the truck back this afternoon. Noise still present.
Not a clue what the deal is with it. The thread linked above sounds like maybe, but I don't know. You can feel the physical impact of the thumping noise I'm hearing on the passenger's side turbo. Not sure where to go from here...