im just guessing also that the leak could be coming from the top of the engine? as to the bellhousing cracks, "YIKES" i would not be surprised to find your pump to converter engagement is fubar,crushed,smashed together. normally i try to sugarcoat bad news but that bellhousing is pure mechanical debotchery! one explanation for the crack is only that hardware was loose installed and somehow the trans jack fell and the trans tilted and that bolt took the full load?