Stuck after valve body repair S.O.S

[TheJerm]

I dropped the brass thermostatic bypass valve in trans fluid I heated up hot. it doesn't poke out. so basically my trans has been bypassing the cooler for who knows how long, or I got half of this little pin in the VB somewhere.

http://www.gearsmagazine.com/magazine/view/623ff3aa-5a80-451c-b3b0-3a95aaece66d#page16