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I decided to change my transmission fluid and filter tonight because I am going on a short road trip thursday with my 73 f-100. When I pulled the pan down I found some sort of plunger. Can anyone tell me what this is. The transmission shifts great and has no problems. I will try to upload a picture.
The small plastic piece is a factory plunger installed in the trans dip stick tub while the vehicle travels down the assembly line to keep dust and dirt from getting into the trans. Once the vehicle is assembled and ready for fluids, the dipstick or some other object is used to push the plunger out of the trans tub in which case it falls into the pan and stays forever more or until someone changes the filter and fluid and finds it. Please chime in if I am incorrect but I believe that this is what it is.
I hope that is what it came from. It would make sense, because I see no where else it could have came from and it appears to have the original filter in it.
that is good news, and bad news. that means that your pan has never been off, and possibly low miles, or, the bad, your trans more than likely has never been serviced, and has alot of miles on it. Keep it as a keepsake, drive the truck as usual.
I really hope your truck has less than 100,000 miles on it, or you might be in need of a tranny rebuild if it's never been serviced before...which is kinda apparent if no one has pulled the plunger yet. Or even better, it has been serviced and some tranny guy thought it was supposed to be in there...in which case find another tranny guy...haha. I can see it now.."What's this thang fer...ahh well extree parts iz always good."
I have an uncle that says if you don't have parts left over you must have done something wrong. Surprisingly he's never had a problem after working on his cars and trucks.