Transmission
#1
#2
If the OD light is flashing and the trans fault light comes on, you need to read out the codes. It takes a high end OBD2 scanner that can read out Ford transmission codes. To buy one is about $150 so you need to take it to a shop. The free code reading service at parts stores is not capable.
Please post the year and model of your truck, along with which engine and transmission.
Please post the year and model of your truck, along with which engine and transmission.
#4