I recently installed a transcooler in my 03 frontier but now I think it is being over cooled. It shifts very smooth. It takes about 20 min of driving to get it above 100 degrees in freezing weather. I wrapped the cooler in card board. The temp sensor is on the out line of the transmission before it hits the radiator. It is a B&m Transmission cooler. Do I need to disconnect the cooler for the winter?