Leaky TH350

[raoul.duke]

Howdy folks- new poster to the board (but it's gotten me through several projects already- thanks).

I've got a 72 Cheyenne, 350/ TH350 transmission rebuilt in 2001 but not many miles on it. I've had the truck for about 2 months.

The tranny is leaking (not a huge deal- shifting great but still annoying). The strange thing is that it the leak seems to get heavier as the truck sits (ex- 2 drops day after driven, a pretty good puddle if it sits for a couple days- and yes, I'm wiping it up every day so it's not just my imagination). This would make sense if it was coming from the pan or the bottom side of the transmission, but it seems that most of the fluid is pooling on the starter so it has to be coming from the top of the housing (I guess).

WTF? Any ideas?

Gracias