Would I really need a tranny cooler if not hauling anything? When I said "use" that's loading it up with large but not terribly heavy furniture.

Any reason it would be more vulnerable to salt than anything else? Kinda thought we dont get near as much as way out east. At least in my 08 VW wasn't seeing anything like that, but then again I do remember hearing dueling claims of one truck fan arguing with others about which brand rusts out.