Planning a trip from Chicago to southwest

Two Jayhawks wrote:
We just returned from two weeks in Springdale & Moab Utah & I agree with others August/September would be too hot for me. Maybe not for you though. Your rig will be fine pulling any pass out west. The slow lane will be chocked full with semi's, RV's, etc. all crawling up the pass so everyone is in the same boat. All of my rigs including the newest all heat up a bit on a long pull that's another reason why I would not choose that time of yesr but that's just me.

There is a huge difference between heating up and overheating. If the temp gauge just goes up slightly over normal that is OK. If it shoots up to the top rapidly that is a concern. All the modern engines are tested to maintain working temps under hard work. Trucks use the same engines as your Dutch Star every day.