I tightened the converter bolts....could the flexplate be cracked up at the crank and make a noise like this??? I dont have a mechanical fule pump on the car.
^ As the folks already stated & you tightened ...
which begs the 'q', are the crank to plate bolts loose?
Course you can't see that, but 'run the build tape in your head'
(as it were)
As it sounds (now),noise is 'decel' only. so my next SWAG's (scientific wild *** guesses)would be ...
1) loose 'tin' (as the folks already mentioned)
2) loose right side motor mount /fasteners.
3) Trans mount / fasteners
= (again SWAGing) fan/ shroud contact on decel.