ok i got a 4560 only overheating when i plow over 1500 RPMS or when outside temp is over 85 degrees. my mechanic thought it was the fan clutch Velocity something. Asked the dealership for their opinion and he said its possible. But he also said it could just be a sensor. But id ont think so cause it doesnt do it everytime but only when its hot or i am plowing. So JD dealership wanted $724 for a new one found used one online for $220 plus shipping. Replaced that still same issue.. what do you guys think it is? what would be the next step?