On Taurus 2003 and on Ford Windstar it's located on top of the transmission, close to the shifting lever.
It's covered with a small rubber cap that has inside ribs to allow
air flow.
The transmission vent on a 2001 Ford Taurus is found on the engine. It is on the driver's side of the engine.
The transmission vent tube on a 2003 Ford Taurus is typically located on the top of the transmission case. It is a small tube that allows air to escape and helps prevent pressure buildup within the transmission. To access it, you may need to lift the vehicle and look at the transmission from underneath. Be sure to consult your vehicle's service manual for specific details and diagrams.
The transmission vent is plugged with debris.
There is a redesigned transmission vent that should fix this problem.
overfill vent on top usually blows excess out of trans.
I had the same problem with my '03 and discovered the selector knob was broken, replaced it and that fixed the problem.
On the top of the transmission.
iv had a problem with the vacuum for changing the vent placing i replaced the blue rubber pad behind the vent selector and it works great ( about 20 bucks at a scrap yard
You shouldn't have to, I believe they all come fitted with one, certainly in Canada they do. The socket is under the front oval vent on the driver side,
To fix the AC vent controller on a 1998 Ford Taurus, first, check the fuses related to the HVAC system to ensure they are not blown. If the fuses are fine, inspect the vacuum lines under the dashboard, as leaks can cause vent control issues. You may also need to remove the dash panel to access the blend door actuator, which can sometimes become faulty. If the actuator is defective, replacing it should resolve the vent control problem.
on the transmission
It has a vent, but it is not for over filling.