Can anyone point me to documentation to confirm what is included in tow hitch package?

It’s supposed to also include the upgraded cooling parts (fan, radiator, cooler, etc.) but I can’t find any details.

I have a boat and what to make sure it has everything needed, unlike my FJ where I added a cooler.

 

Also looking for information on this. I am assuming all TX's that can tow 5,000 lbs already has the tow package that include transmission cooler, etc... from the factory.

Can anyone confirm this is true?