Found Part While Removing Transmission/Engine Options

[laughatthemall]

Well, as the title states, while pulling the engine and transmission, I found a part laying on the ground. The car is a 1996 Toyota Celica ST, 1.8L 7A-FE, 5-speed transmission. The part was found after the engine was removed (with transmission still attached), directly after separating the transmission from the engine on the engine lift. I cannot for the life of me figure out where this came from. It appears to be a valve of some sort, it has a screen in one end, and a spring inside. Anyone have any insight? Thanks!

Pictures of part:
http://imgur.com/a/1YVJs

[laughatthemall]

The slave cylinder 'did' come apart, but I have all parts. All that came off it was the rubber boot, where it is split, and the pin appears to just 'sit' in there sandwiched between it and the release fork. I plan to replace it. I was guessing master/slave cylinder too and it appears to be for neither. It's nothing in the transmission is it? C52, I believe it would be.

I am not sure if it still works fine without it. I have not gotten it together yet, I'm really trying to do it 'right'. I took the whole core support off to replace it (spot weld drilling sucks), painted the whole bay, just got done disassembling and reassembling the transmission (replacing the input shaft seal and ensuring everything looks to be in good order, plus cleaning off that big magnet of any metal). It was definitely out of wherever it was from before the transmission came apart, I just did that yesterday.