Ford 2003 Mustang Workshop Manual page 339

22. CAUTION: Do not under any circumstance loosen the nut to reduce preload. If it is
necessary to reduce preload, install a new collapsible spacer and nut.
CAUTION: Remove the special tool while taking readings with the Nm (inch-pound)
torque wrench.
Tighten the nut to set the preload.
Rotate the drive pinion occasionally to make sure the differential pinion bearings seat
correctly. Take frequent differential pinion bearing torque preload readings by rotating the
drive pinion with a Nm (inch-pound) torque wrench.
For new differential pinion bearings, tighten the nut to specification. Refer to torque
specifications for new differential pinion bearings in the Specifications portion of this
section.
For used differential pinion bearings, if the preload recorded prior to disassembly is lower
than the specification for used bearings, then tighten the nut to specification. Refer to
torque specifications for used differential pinion bearings in the Specifications portion of
this section.
For used differential pinion bearings, if the preload recorded prior to disassembly is
higher than the specification for used bearings, then tighten the nut to the original reading
as recorded.
Final assembly
23. Install the differential assembly in the differential housing. For additional information, refer to
Differential Case
24. CAUTION: Align the index marks.
CAUTION: Install the driveshaft with new bolts. If new bolts are not available, apply
Threadlock and Sealer EOAZ-19554-AA or equivalent meeting Ford specification WSK-
in this section.