So your options are:
1. You let the local dealership give it a try cause you still got powertrain warranty till 2024/100,000km(unless you upgraded that?). Then you have the possibility of repeating issues, or the creation of more issues if the job isn’t done right.
2. You travel to another dealership. I know all about this, I’ve recently moved to southern Manitoba but when I was in the north, the only dealership was a 3 hour drive, and that dealership was lucky to have a single tech show up most days.
Now that I am in the south, I use Steeltown Ford in Selkirk without any issue, they’ve been great. But if it was me, I’d be willing to travel to find a trustworthy dealership if you plan on keeping your Expedition for a long time.