First time posting but long time following this forum. To start off I have a 2016 jk 4dr 35 in tires 3.5 inch lift new steel bumpers ,winch,5.13 gears, lights ,the works you know. Couple weeks ago I went from phx az to Laughlin nv and it didn't take long for my jeep to start overheating. Never had a problem before, temp gauge and evic always stayed at 210. Temps here are usually 110 but jk was running into 258 at 70 mph. All the hills made me drive 35 up them to keep the temp down. So right away I removed winch cover and grille and continued driving. Same result. Not big into mudding and it only has 10k miles on it. Anyways sry for the long rant but the story leads to the dealer. Waited two weeks at the dealer and all they came up with it's all fine. Said it's common for lifted jeeps with big tires to over heat. They said to get a bigger radiator installed to help and that's it. So guys what's up....Is anyone else having this issue.