With outdoor temps in the 80s and light city driving (via Torque) my tranny temps are running 160-190. I decided to buy the Hayden 697 cooler and was able to mount it well spaced off of the SC LTR with some coupling nuts used as spacers. I also found an off the shelf 90 deg metal bracket at the hardware store that secured the bottom of the cooler to the 90 deg tab off the inside of the front bumper structural cross beam. Pretty clean mounting. Curious to see the drops, expecting at least 20 degrees. Out of an abundance of caution I am also going to fully flush the fluid and get fresh Valvoline MaxLife ATF back in. Not to rehash but from the Valvoline website,

"Suitable for use in ... Toyota WS"