changing the transmission filter on my 2003 mercury grand marquis and a little plastic yellow piece with an o-ring on it fell out . What is this part and is it important and where does it go?


Asked by Aug 05, 2012 at 01:49 PM about the 2003 Mercury Grand Marquis GS

Question type: Maintenance & Repair

2003 Mercury Grand Marquis needing transmission fluid and filter changed due to severe contamination.

4 Answers


It s a factory piece only used in production. It serves no purpose now. -- throw it away and carry on!

4 out of 4 people think this is helpful.

Thank you a whole lot. That helps and people like you make things so much easier. Do you have any idea what purpose this thing served?

1 out of 1 people think this is helpful.

Can anyone tell me why my parking lights won't work? Same car. My husband also wants to know how he can dry fill the transmission?


That piece was used as the trans dip tube seal. So when the car was assembled and the dipstick was added it pushed it into the bottom of the transmission pan. To add trans fluid, put a funnel into the trans dipstick tube. As far as the parking lights, you'll have to look at the headlght switch and wiring. Might have melted or corroded and or come loose.

1 out of 1 people think this is helpful.

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