Hey all, I purchased a 2005 LR3 yesterday at a dealership it drove great on the side streets around the dealership the only issue is the sensor was out on the special functions drive that switches it to gravel, snow, etc. However when I got it on the freeway to head home anytime I took it over 75 mph it would start to over heat. If I dropped it below 65 after that the temp would go back down. I returned it to the dealership and they are supposed to be investigating it. Anyone know what might cause that overheating issue?