The 6R80 and 10R80 transmissions have an internal thermostat which opens at 180 degrees. If you are running a fanned cooler with straight 12v power, this means that the fan will be on even before transmission fluid hits the core. To control this, just add this 180 degree switch. Installation is simple, just connect this fitting to any of the an lines in the cooling system. Then run your 12v power for the fan through the switch. The switch will turn on the fan at 180 degrees and shut off at 165 degrees.
