On a 1998 Ford Taurus : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
You pour it into the plastic container on passenger side near alternator, It has a large black cap.
According to the 1999 Ford Taurus owner Guide : ( 16.0 U.S. gallons , all vehicles )
That is just over 12 gallons
On a 1997 Ford Taurus wagon : Open the rear liftgate and you will see a fill plug by the passenger side tail light
60.6 litres / 16.0 U.S. gallons
If a transmission is leaking fluid, it is likely that a seal or gasket has failed. Replace the gaskets and seals and the leaking should stop.
The rear tailgate lock on my taurus wagon will not unlock. How do I open the back panel to get to the mechanism
Your washer pump is located right in the washer fluid bottle on the bottom of it.
Either ( 16 U.S. gallons or the optional extended range gas tank which is 18.6 )
If it's like my 1999 Taurus Wagon...push in the button that the key goes into