Pinion Flange & Oil Seal: Installation

Thoroughly clean contact area. Inspect pinion flange oil seal surface and drive splines. Replace pinion flange if damaged. Lubricate inside diameter of seal. Place pinion seal into housing bore.
Using Seal Installer (J-23911 for 7 5/8", J-22836 for 8 1/2" and 8 5/8", or J-22388 for 9 1/2"), install pinion seal. Apply a coat of high-temperature lubricant to pinion seal lip.

CAUTION: Do not hammer flange onto pinion shaft to install. Ring gear and pinion will be damaged.

Align pinion flange marks with marks on pinion. Install pinion flange. Install washer and NEW nut to pinion. Tighten nut snug, taking note of scribe marks and number of exposed threads. Measure pinion preload. Using pinion flange holder and remover, tighten nut in small increments. Rotate flange after each increment. Tighten pinion nut until original preload.
On all models, except "S" and "T" series, if original preload was less than 3 in. lbs, set preload to 4-7 in. lbs. On "S" and "T" series, set preload to 3-5 INCH lbs. (.3-.6 N.m) greater than original recorded specification. On all models, if rotating torque has been exceeded, a new collapsible spacer will have to be installed. Install drive shaft. Add lubricant as needed.