the over drive light whenever you raise the speed 60mph the light star flashing

no, it is not. it is an indicator of a problem. take it to the trans shop and have it checked. Roy

You need a new shop. A qualified shop will complete a diagnosis and give you a straight forward answer as to what is wrong and what it will cost to fix it. Here is a directory of shops near you. http://repairpal.com/ford-repair-in-dallas-texas