There is no Titan cooling flaw, it's very rare that the Titan overeheats...It's time to get her back to the dealer to see what's wrong...Is it still under warranty?well ive tried everyting and for some reason mine always pverheats if im pulling something like a small boat, or a large size uhual trialor, or just a couple fourwheelers.. I live in florida so there's not even any steep inclines lol.. ive tried dropping it and nothing is different besides the rpms' and the power, it still over heates..
I had similar experience when towing my 5,500 boat and trailer around. Finally replaced the radiator and all overheating when towing disappeared overnight. 👍🏼Just wanted to let everyone know since there was no real definitive answer or follow up on this. I had same issue. Only overheating when towing fine around town. I had my expansion tank camp replaced and then my thermostat, water pump and fan clutch. Still overheated. Then went back and did my radiator and that was the fix. Transmission even runs cooler according to gauge. So start with the radiator. Good luck