Ford 2003 Mustang Workshop Manual page 2563

32. Rotate the transmission to the horizontal position.
33. Install the parking pawl.
1. Position the parking pawl return spring.
2. Position the parking pawl.
3. Install the parking pawl shaft.
34. Install a new extension housing gasket and the extension housing.
1. Position the extension housing.
2. Install the four bolts and two nuts.
35. Using the special tool, install a new extension housing seal.