Ford 2003 Mustang Workshop Manual page 477

housing.
15. NOTE: Disregard the index marks if installing a new rear axle pinion flange.
Position the rear axle pinion flange.
1. Lubricate the rear axle pinion flange splines.
Use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or
equivalent meeting Ford specification WSL-M2C192-A.
2. Position the rear axle pinion flange.
16. Using the special tool, install the rear axle pinion flange.
17. CAUTION: Do not under any circumstance loosen the nut to reduce preload. If it is
necessary to reduce preload, install a new differential drive pinion collapsible spacer and
nut.
Tighten the nut to set the preload.
Rotate the pinion occasionally to make sure the pinion bearings seat correctly. Take
frequent pinion bearing torque preload readings by rotating the drive pinion gear with a
Nm (inch/pound) torque wrench.
For new pinion bearings, tighten the nut to specification. Refer to torque specifications for