Thanks bro.
Yes, I went all in so I have the option to tow up to 5,000 lbs. The ATF cooler is necessary to have the max available for towing. It was one of the items on the parts list installed by the dealer. Yeah, wasn't inexpensive (at least to me), parts and installation was $2,000 but I will add when I was negotiating my purchase the dealer moved on the trade-in value to get to my price point. They did not move on their hitch install cost. FWIW another dealer quoted me $1,600 for the same components with installation -- but they would not move on their selling price. End of the day I was able to purchase at my price with the hitch components installed.