Ford 2003 Mustang Workshop Manual page 473

39. CAUTION: Do not use acids or solvents when cleaning the differential clutch packs.
Wipe the components only with a clean, lint-free cloth.
Clean and inspect the differential clutch packs for wear and damage. Install new parts as
necessary.
Assembly
Initial assembly
1. Coat the new differential drive pinion bearing cup(s) with lubricant.
Use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent
meeting Ford specification WSL-M2C192-A.
2. Using the special tool, install the differential drive pinion bearing cup(s).
1. Position the bearing cup(s) on the special tool.
2. Position the special tool and the bearing cup(s) in the differential housing.
3. Tighten the special tool to fully seat the bearing cup(s) in the bore(s).
3. NOTE: Apply a light film of SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-
B or equivalent meeting Ford specification WSL-M2C192-A on the front and rear pinion