Tell me how many people use these kinda coolers for transmissions?

Yes . . . . a popular accessory (with those who know something about cars - such that heat build-up is the ruination of automatic transmissions).......have been available as aftermarket.......Lincolns and Thunderbirds once used them in the 60s (and even had similar power steering fluid coolers). Only problem is finding a place to put it where it will be in the air-flow. Good goin.

the cooler doesn't have a effect on shift feel only keeping the fluid cooler when towing or plowing with a car or truck. most of todays trucks do have a bigger radiator and auxiliary cooler

Why not use quality synthetic so you don't need a transmission cooler?