User Ibaker documented a lengthy saga diagnosing his misbehaving MD Mondeo, where it turned out to be a faulty EGR causing weird transmission behaviours. This is probably the kind of symptom your specialist is thinking of. You can read the thread here:
https://fordforums.com.au/showthread...1476408&page=2
I think a characteristic of the EGR fault is that it doesn't store any fault codes relevant to the transmission, which makes it extra hard to diagnose. As you have a DTC related to a transmission component (a shift solenoid), I think it's more likely you have a direct fault in the transmission than the EGR issue.
Do let us know if the techs at Ford manage to find out anything more, or fix it
