Ranger 4WD V6-245 4.0L VIN X SFI (1999)
4. Install an inch-pound torque wrench on the pinion nut and record the torque required to maintain rotation of the pinion through several revolutions.
5. CAUTION: After removal of the pinion nut, discard it. A new nut must be used for installation.
Using the special tool, hold the pinion flange while removing the pinion nut.
6. Mark the pinion flange in relation to the drive pinion stem to ensure correct alignment during installation.
7. Using the special tools, remove the pinion flange.
Installation
1. Lubricate the pinion flange splines.
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Use Thermally Stable Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.