Well its official - I completely forgot to plug the pass side hole. Its all my fault - 100%. This is what my shop looked like at the time, my guy left and was doing 7 jobs alone of which 4 were engine rebuilds.
Took the car out now twice and she is HAULING!!! Not a single issue with the trans, shifting like a beaut!
Apologies for wasting your time! Its the OD lockup control port - I removed it not realizing upon re-installation 2 months down the road!
Here is a shot - kudos if you can spot the wife hiding in there somewhere