Ford 2003 Mustang Workshop Manual page 2435

9. Lower the transmission to access the extension housing bolts.
10. Remove the extension housing and gasket.
1. Remove the bolts and the nuts.
2. Remove the extension housing and gasket.
Installation
1. Install the extension housing and gasket.
1. Install the extension housing gasket and housing.
2. Install the bolts and the nuts.
2. Using the special tool, install the new extension housing seal.