I recently bought an 04 Dodge dually 168 K auto trans diesel. This truck's temp guage runs about a needle or 1.5 needles past the 200 midrange mark on the temp dial. Is this normal??? One time I was pulling a load of hay (14 rd. rolls) up a steep hill and the guage almost got to the 240 mark but no boilover or anything noticeable.. I might add, at the time, I didn't have the trans in tow mode but it got me wondering--If I had a load of cattle going up and down steep terrain would the engine over heat?? What do yall think??