What's the ford explorer 5r55s transmission fluid type?

The Ford 5R55S uses Mercon V fluid in the transmission. This is a synthetic type of fluid that is designed to protect the gears in Your vehicle. It is a good idea to check the transmission fluid in Your vehicle every time that You change the oil. You will want to make sure that the fluid is full and that it is also free from any signs of debris. Typically debris will make Your fluid look reflective or sparkly because it is caused by small shavings of metal. If You do see debris in Your transmission fluid it is a good idea to flush the entire transmission to get any particles out of it before it can cause any more damage to the gears.