Do I need an aux transmission oil cooler installed on my 2007 Chevrolet Suburban?

[Mark]

I have a 2007 Chevrolet Suburban and will be towing a travel trailer with a max weight of 4500 lbs on our family vacation next month. The suburban has no aux transmission cooler. Do I need an aux. transmission cooler installed before the trip. I have called numerous chevy service departments and the majority have said that I dont need one unless reaching high end of the tow rating.... 7k and up. only a couple have said that I should install one. Any feedback would be appreciated. Thanks

[Referance Point]

Any transmission repair shop can add one.

[timothy p]

It may not be required but would be wise. They aren't too terribly expensive or difficult to install and will help your transmission last longer.