interchangeable parts are very cool... here's a transmission that is used in 11 different car brands, the Aisin AW55-50SN

2006-- Pontiac Torrent
 2004-- Chevrolet Equinox
2004 Saturn Ion
 2003--2005 Volvo
2002--2008 Lancia Thesis
2002--2008 Opel Vectra
2002--2003 Saturn Vue V6
2003-2007 Saab 9-3
 2004-2006 Nissan
2001-2007 Renault Laguna V6
2007-2008 Suzuki XL7

Found on http://karakullake.blogspot.com/2013/09/transmission-manufacturers.html