Ford 2003 Mustang Workshop Manual page 485

39. Install the differential ring gear.
1. Place the differential ring gear on the differential case.
2. Hand start three bolts to align the holes in the differential ring gear and the differential
case.
3. Place the differential case and differential ring gear onto the press bed blocks with the
differential ring gear teeth facing downward.
4. Press the differential ring gear into place.
40. Install the remaining bolts.
41. Place the differential case with the special tools into the differential housing.