I think my cooling problem is airflow. Truck heats up in slow, stopped traffic. Cools back down when it starts moving again. I have seen 230-240. You can feel the heat coming out once it start moving. Today I started the truck and let it idol in gear in the garage. Temp went up past the thermostat (180) to 200 opened the hood to let hot air out, no change. Shifted to neutral and increased the idol and the temp drops. It does have a shroud but it could be tighter to the fan. It has a 17” 6 blade Flex-o-lite SS fan. I have been thinking about going to a 7 Blade 18”. Any other ideas?