Ok so tranny's out and disassembled!

Here's what I found...

The sprag is fine and not the culprit.

I found a snap ring laying in the extension housing.
It seams as though I may not have installed the medium snap ring that holds the governor body valve in place all the way and it popped off after a few miles...
That's why it was working perfect after install and started slipping later!
I'm so glad I don't have to buy a new sprag! I am so broke right now...