I already have installed a hayden tranny cooler. I then realized that while it does help when i tow, it prob. does not do much for when i am rockcrawling. I am guessing that one with a built in fan would be better. B&M has one with a fan and an automatic thermostat that rurns on at 160 degrees I think. Is it worth the $200 or should I leave well enough alone. I also saw a 9" elec fan on e-bay for like 20 bucks. I figured I would wire it to a switch and just turn it on while going slow. The advantage here is that I could have it off while going through mud. What do you all think?