My 94 yota's a/t temp light comes on after about an hour of driving @ 75mph. I think my cooler needs to be cleaned. What is the best way to clean the cooler? Should i pull it off? I just had my transmission filter changed about a month ago. Truck has 140k.

 

Pull the cooler off and flush it out with some carb cleaner and then blow it out with compressed air and put it back on.

 

Thanks