If I said it and track pack had it and tech pack didn’t and it’s drivetrain related, I’ll try the coolers.
Engine. transmission and rear diff.
I know transmission and rear diff was only available with track pack.
Not 100% on engine cooler.
it’s possible they both had an engine cooler as even base GT has engine oil cooler.
I will give it to you, it was the transmission cooler.
It caused a major stir, especially in the southern states
where it is much hotter. The car in all its version was
advertised as a track monster and the tech pack would go into limp mode
after 10-12 minutes, transmission couldn't handle the heat.
North of the border less of a concern as its cooler and less were taking to tracks.
To the point where some were demanding ford offer fix for free, to companies and people
designing and adding their own. Ford fixed the problem in 2017 but including all coolers and
even changed the wing, so all were track packs, and options came in seating etc.
All that said, your turn, hopefully someone else will get in the game lol.
ask away.