Auto Trans Small Leak?

[indecline]

I've been trying to help a local mechanic diagnose a small leak on a 4hp22 trans. What are all the possible locations it could leak from? I'm not exactly sure but it seems to be leaking out of a small switch. Vauge I know, getting familiar with components...

[DesertBMW]

selector shaft seal

[indecline]

Thanks dude. I'll report back with my findings