Drive Pinion Flange and Drive Pinion Seal

Drive Pinion Flange and Drive Pinion Seal

Special Tool(s):

Material:

Removal
1. With the vehicle in NEUTRAL, position it on a hoist.

2. NOTE: The wheels and disc brake calipers must be removed to prevent brake drag during drive pinion bearing preload adjustment.

Remove the disc brake caliper bolts and disc brake caliper.
^ Using mechanic's wire, position aside the disc brake caliper.





3. Remove the brake disc.





4. Index-mark the driveshaft flange and pinion flange for correct alignment during installation.





5. Remove the 4 driveshaft flange bolts.





6. CAUTION: The driveshaft centering socket yoke fits tightly on the pinion flange pilot. Never hammer on the driveshaft or any of its components to disconnect the driveshaft centering socket yoke from the pinion flange. Pry only in the area shown with a suitable tool to disconnect the driveshaft centering socket yoke from the pinion flange.

Using a suitable tool as shown, disconnect the driveshaft centering socket yoke from the pinion flange.
^ Using mechanic's wire, position the driveshaft aside.





7. Using a Nm (inch lbs.) torque wrench on the pinion nut, record the torque required to maintain rotation of the pinion gear through several revolutions.





8. Using the special tool to hold the pinion flange, remove and discard the pinion nut.





9. Index-mark the pinion flange in relation to the drive pinion stem to make sure of correct alignment during installation.





10. Using the special tool, remove the pinion flange.





11. Force up on the metal flange of the drive pinion seal. Install gripping pliers and strike with a hammer until the drive pinion seal is removed.





Installation
1. Lubricate the new drive pinion seal with grease.

2. CAUTION: If the new drive pinion seal becomes misaligned during installation, remove the drive pinion seal and install a new drive pinion seal.

Using the special tool, install a new drive pinion seal.





3. Lubricate the pinion flange splines with axle lubricant.

4. NOTE: Disregard the scribe marks if a new pinion flange is being installed.

Align the pinion flange with the drive pinion shaft.





5. Using the special tools, install the pinion flange.





6. Position the new pinion nut.





7. CAUTION: Under no circumstances is the pinion nut to be backed off to reduce drive pinion bearing preload. If reduced drive pinion bearing preload is required, a new drive pinion collapsible spacer and pinion nut must be installed.

CAUTION: Remove the special tool while taking drive pinion bearing preload readings with the Nm (inch lbs.) torque wrench.

Using the special tool to hold the pinion flange, tighten the pinion nut.
^ Rotate the drive pinion occasionally to make sure the drive pinion bearings are seating correctly.
^ Install a Nm (inch lbs.) torque wrench on the pinion nut.
^ Rotating the drive pinion through several revolutions, take frequent drive pinion bearing preload readings until the original recorded drive pinion bearing preload reading is obtained.
^ If the original recorded drive pinion bearing preload is lower than specifications, tighten to the appropriate specifications for used drive pinion bearings. If the drive pinion bearing preload is higher than specification, tighten the pinion nut to the original reading as recorded.





8. Position the driveshaft and align the index marks on the pinion flange.





9. CAUTION: The driveshaft centering socket yoke fits tightly on the pinion flange pilot. To make sure that the driveshaft centering socket yoke seats squarely on the pinion flange, tighten the driveshaft flange bolts evenly in a cross pattern.

Install the driveshaft flange bolts.
^ Tighten to 103 Nm (76 ft. lbs.).





10. Install the brake disc.





11. Install the disc brake caliper and the disc brake caliper bolts.
^ Tighten to 27 Nm (20 ft. lbs.).