Mechanic Q: Over heating?

i have a 2004 Dodge Ram 1500 quad cab with a 4.7 engine. During normal driving the temp gauge is at normal, however when i tow a load (boat) truck overheats. I've replaced the fan clutch, flushed the radiator and replaced the thermostat and it still overheats when i tow my boat. Truck has factory tow package with oil and transmission cooler. Any help would be appreciated. Thanks in advance for your help

Q: over heating?

i have a 2004 Dodge Ram 1500 quad cab with a 4.7 engine. During normal driving the temp gauge is at normal, however when i tow a load (boat) truck overheats. I've replaced the fan clutch, flushed the radiator and replaced the thermostat and it still overheats when i am towing my boat. Truck has factory tow package with oil and transmission cooler. Any help would be appreciated. Thanks in advance for your help