Hmmm. I must admit - this does make good sense Charlie. It does go below freezing a few times here in northern Bama, but nothing like up Nawth. I like the idea of keeping the tranny cooler by not heating up the fluid through the radiator. My truck originally had no tranny aux cooler, and I added the little stock XJ cooler like the one below several years ago. It seems to do the job, since I don't tow much anymore and have never had any problems with it getting overly hot. What I like most about bypassing the radiator is that it eliminates two of those potentially leaky quick connectors.