From reading other threads I believe there is a rubber doughnut thing left by the factory or tranny manufacturer that does not hurt anything. I am going to have my tranny flushed and have never dropped the pan to remove this rubber thing and just want to make sure it wont hurt anything before or after flushing the tranny. It wont get caught anywhere during the flush or anything like that would it? Thanks

 

Here is a picture of it.
It is in the upper right corner.
On the left, the magnet.