No sensor to adjust. It'* a fixed Thermocouple, and the PCM watches it until it reaches a specific value. You'd need to burn a custom PCM.

I just used a small piece of plexiglass and covered half the cooler in the winter. Held on with wire twist-ties for a garbage sack. Worked great, and you couldn't see it with the hood down.

I am talking about the outdoor temperature sensor that (on the 2000+) sits behind the grill in front of the condeser. When I first installed the tranny cooler, the sensor was picking up heat off of it. For example, it was about 70 degrees outside, but the climate control was displaying that it was 89 outside.

The sensor is mounted on a swivel post that you can rotate. I just rotated mine so the end of the sensor was pointing away from the cooler and getting clean air through the grill. It is easily within a degree or two of ambient.

Rogue, mine is rated for 16000 lb GVW and measures about 14"x8"x1" thick. It mounts perfectly between the A/C condenser and the bracket that runs from under the condenser to up around the hood latch. I have mine centered behind the grill. Both lines exit to the driver side around and behind the radiator. Once you get behind the radiator, there is all kinds of room.

Jay

You don't need a big cooler for the 2000 + cars. Mine is only 11" x 4" x 3/4" thick and sits nicely off a homemade bracket in front of the condenser behind the driver side grill opening. It does a fine job of knocking the trani fluid temperature down about 20* F.(measured with an infra-red temp gun). It'* located far enough away from the outside temp sensor so it doesn't affect it at all.
....and I don't notice any problems with delayed converter lock-up.

Will'* suggestion of blocking the cooler with a sheild is a good one, if it does become a problem.