Found parts in my 904 Pan

I can tell because of the other stuff in that pan that the trans is done.
It needs a rebuilt at the very least.

And the screw is from the valve body as it looks too short for a filter screw. (which is what you usually find if one falls out)
It probably also made zero difference that it was out.

I took the pan and cleaned it out. The amount of crud was disheartening. This 904 will go into my shop and be my learning opportunity on rebuild transmissions. But for the short time I will be installing the 727 to get it up and running again. I know I will need to get my driveshaft cut down but other than that I'm not sure. Any advice?