Youther,

First, its not too late...get that transmission fixed and run for the hills!

Just kidding, congrats on getting married.

As for the tranny, if the bottom pan is leaking, your "out of business" tranny guy could have simply over-tightened your pan gasket causing it to leak after a few miles.

I would suggest draining the tranny and inspecting the fluid. If it looks clear of contaminants, then continue by removing the pan carefully so as to find where the gasket failed. Inspect the mounting flange so as to determine if the pan is bent or if they simply over-tightened the gasket.

If all is good, replace the gasket and refill with fluid and then check for leaks. You may have to straighten the pan flange or replace the pan all together to correct the issue. Hopefully this will resolve the issue and have you back on the road ready for the big day!

Best regards!
Troy