tranny pan leaking

First make darn sure it's the pan leaking as dip stick tubes 'O' ring and /or selecter shaft seal can fool you.
If you do pull the pan back off dont be afraid to take a hammer to it. Where it was over tightened the ball pien will dimple the bolt holes back outward then whatever it takes to make sealing surface lay flat on a table like surface.
Reusable gaskets aren't so reusable if it has been over tightened. Don't see the need for that myself. Aint like I'm going back in frequently.