Odd nobody has mentioned what my 2004 Hemi 4x4 Durango has. Mounted diagonally on against the drivers side fender is an auxillary cooler with an electric fan. When I'm towing in high heat here in the desert this cooler will turn on for short periods. When it does the fan noise is very noticiable (loud!). The water temp guage drops almost instantly.

Nobody elses has this extra cooler that is mounted totally seperate of the radiatoroff to the side diagonally between the front and drivers side fender of the vehicle???

 

I also have the auxiliary cooler with fan in my '07. It is standard with the tow group option along with tranny cooler and power steering cooler.