Ford 2003 Mustang Workshop Manual page 343

(4010) to protect the machined surface from damage.
Using a pry bar and a wood block, remove the differential assembly from the differential
housing.
8. Remove the 10 bolts.
9. CAUTION: Do not damage the threads in the bolt holes.
Insert a punch in the bolt holes, and drive off the ring gear.
10. If the ring gear backface runout measurement, taken at the beginning of this procedure, did not
exceed the specification, proceed to the appropriate procedure as necessary:
Differential Case and Ring Gear
gear backface runout measurement, taken at the beginning of this procedure, exceeds the
specification, the cause may be a warped ring gear, differential case/differential bearing
damage. Proceed as follows to verify the cause of the excessive runout.
11. Position the differential assembly, including the differential bearing cups (4222) and differential
bearing shims (4067), in the differential housing. Install the bearing caps and bolts.
in this section, or to Installation in this procedure. If the ring
Drive Pinion ,