I have a stock, 2wd Tacoma and I don't tow anything currently, but I likely will in the future (small aluminum boat, etc.). In the interim and like all of us, I just want my transmission to last as long as possible even though it's my daily driver!
Having said all of this, I was reading on another forum about the Hayden 678 and 679 coolers and the poster was concerned that while you want your fluid to be cooler...you don't want it to be TOO much cooler. He was wondering if, by installing a larger tranny cooler, you're doing your fluid a disservice by making it too cold!
Is this possible? Is there such a thing as keeping your tranny fluid TOO cool, or is this concern a bunch of hooey?