But seriously, it would be more helpful for those looking at similar problems if the solution was there at the original post.
I wasnt sure myself this was for that problem but I had a feeling it was.
Glad you finally resolved that!
I finally got a set of ECS02'S (On another car though, not the Mustang), and recommend them highly.
I tried them back to back with Michelin Pilot Sport 5's on that car (same sizes, different wheel sets) and I found the Continentals noticeably more comfortable, while still being confidence...
One thing to try is to have a person bounce the car while putting a hand on the camber plate and feel for any movement/vibration.
Found a worn strut mount causing noise this way (not a Mustang though).
Thanks for the pics!
See anything that could be causing your fan issue?
The inside of the socket does look like a lot is getting in there.
Could it be like the bouncing windows where socket cleaning and some dielectric grease to seal the connection resolves a lot of them?
If you are looking at radiator upgrades, @robvas posted a cht datalog showing stock rad, stock rad with lower temp thermostat, then lower temp thermostat with Mishimoto radiator.
It showed the Mishi performing very well!