Towing with an '04 Sienna

New to us, 2004 Sienna XLE Ltd. We've pulled our fishing boat with our 97 AWD Previa in the past and it's done great. How should I expect the Sienna to do? The boat with motor is around 2,400. The Sienna did not come with the towing package as far as I know since it doesn't have a hitch yet. Can I put a hitch on and add a transmission cooler, is this enough to do? How much does a transmission cooler cost?

Anyone pulled with the Sienna and a Previa to know the difference? I know the Previa is better for taking the boat up the ramp as it's an AWD and the Sienna is a FWD.

Any help would be greatly appreciated. I don't want to ruin the Sienna.