F 150 2WD Pickup V8-5.4L SOHC SC VIN 3 (2003)
10. CAUTION: After removal of the pinion nut, discard it. A new nut must be used for installation.
Ashy the special tool, hold the pinion flange and remove the pinion nut.
11. Mark the pinion flange in relation to the drive pinion stem to make sure of correct alignment during installation.
12. Using the special tool, remove the pinion flange.
Installation
All vehicles
1. Lubricate the pinion flange splines with rear axle lubricant.
2. NOTE: Disregard the scribe marks if a new pinion flange is being installed.
Align the pinion flange with the drive pinion shaft.