Ford 2003 Mustang Workshop Manual page 2710

7. Using the special tools, remove the extension housing fluid seal.
8. Remove the seven bolts and the identification tag.
9. CAUTION: The gearshift offset lever is under spring pressure.
While applying downward pressure on the gearshift offset lever, remove the extension housing
and the gearshift offset lever as an assembly.
10. Remove the gearshift offset lever, the split pin, the shifter detent spring, and the detent ball.