Ranger 4WD L4-2.3L VIN D (2002)
4. Using the special tools, drive the inner pinion bearing cup into the axle housing.
Setting pinion depth
5. CAUTION: Whenever new cups are installed, new pinion bearings must also be installed.
NOTE: If a feeler gauge can be inserted between a cup and the bottom of its bore at any point around the cup, the cup is not correctly seated.
Make sure the cups are correctly seated in their bores.