Here is what I did.
These are thermostatically controlled with the tstat on the back side so the fan comes on if the return oil gets above 160° There is enough air coming out of them that the fans have not come on yet. I towed a 3/4 ton pickup last night and it was a pull. The trans got warm, but the cooler kept it from overheating and the fan still did not dome on. The fan by the way pushes cool air into the engine bay. You can see a lot heat come out the top on any day.
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