If I were to tow a small trailer with say, a Polaris Rzr or a quad, would I need a tranny cooler?
Need, probably not, but......you do live in Nevada and tranny coolers are super affordable insurance(like $50)vs. a new tranny($$$$$$$$$). Also when doing research for a prop speed reduction unit(airplane tranny) I am designing, I talked to quite a few transmission guru guys and they all said that the cooler you keep the xmsn fluid, the longer your transmission will last. The benefits were really staggering. The temperature affects the transmissions life on an exponential level. I have thinking about this mod myself, but I currently have some seriously epic projects on the horizon that would negate the effects. They are however easy as hell to install(think brackets to hold the cooler and a hose connection). A good idea would be to either rig up some active cooling(fan) or build up a well designed air intake/exhaust shroud to help cool it. Otherwise you are just adding surface area to your trans. which while it does work, really only works very little.