I have an 05 Ford Explorer Eddie Bauer. The check transmission light will come on and the o/d light will flash after driving it for a while. I know my rear hub needs to be replaced, but recently was told my coolant temperature sensor needs to be replaced too. I have taken it to a garage that specializes in transmission problems but was advised no codes came up for it. So, is the problem because of the sensor, hub, or both? And is it possible that the sensor isn't bad but possibly the wiring?