Ford 2003 Mustang Workshop Manual page 319

Section 205-01 .
5. Install an Nm (inch/pound) torque wrench on the nut and record the torque necessary to
maintain rotation of the drive pinion gear through several revolutions.
6. CAUTION: After removing the nut, discard it. Use a new nut for installation.
Use the special tool to hold the pinion flange while removing the nut.
7. Index-mark the pinion flange and drive pinion gear stem to maintain initial balance during