I read this after sending you a PM. Hopefully this will help my situation too.The TSB came out back in December of 2022 I think?
The causal part (5th/6th gear synchro) listed in the TSB ( MU7Z-7107-C) was the exact same synchro that the vehicle was built with from the factory, which is why many of the people that had the TSB done have had the noise come back... nothing was changed, basically replacing the same part that failed originally.
Fast forward to about a month ago, and Ford has revised the part and superseded it with the MU7Z-7107-D revision. There are only a few people that have had the new revised part installed, but so far it looks promising as far as repairing the issue.
The transmission assembly part number has also been revised to MB3Z-7003-E, changed from MB3Z-7003-A, I'm assuming because they also now have the revised parts in them. However, to my knowledge, nobody has received the updated transmission. These are still currently listed as backordered.
As far as being a '23 and not being listed on the TSB, this is mainly just because Ford has not updated the TSB yet. I'm guessing they will eventually, but either way this makes no difference. It doesn't need to have the TSB to have the issue fixed. It would just need to be claimed as a normal transmission repair.
If I was the technician working on your vehicle at Harvard Ford, I would verify the noise then order a brand new transmission under the low time in service policy as the TSB doesn't apply to yours technically. This way you would have a new updated -E transmission on order and in the meantime you could continue to drive it until it came in.
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