Pinion Oil Seal Replacement 10 1/2 Inch Ring Gear

Tools Required

The pinion oil seal and the companion flange may be replaced with the carrier assembly installed in the vehicle.

1. Raise the vehicle on a hoist and support with safety stands.

Important: Observe and mark the positions of all driveline components relative to the propeller shaft and axles prior to disassembly. These components include the propeller shafts, drive axles, pinion flanges, output shafts, etc. All components must be reassembled in the exact relationship to each as the components had prior to disassembly. Follow all specifications and torque values, as well as any measurements made prior to disassembly.

2. Mark the installed position of the rear propeller shaft.
3. Disconnect the propeller shaft. Refer to Propeller Shaft Replacement - One Piece , Two-Piece Propeller Shaft Replacement , or Three-Piece Propeller Shaft Replacement .

•	Use a piece to tape in order to hold the bearing caps

•	Secure the propeller shaft up and out of the way in a manner that does not put unnecessary stress on the universal joints




4. Measure the amount of torque required to turn the pinion using the J 5853-B .

•	Record the torque measurement for reassembly

•	The measurement give the combined pinion bearing, seal, and carrier bearing preload.




5. Make an alignment mark (1) on the pinion stem, pinion flange (2), and pinion flange nut.
6. Record the number of exposed threads on the pinion stem for a reference.



7. Hold the pinion flange with the J 8614-01 .
8. Remove the pinion flange nut and washer.



9. Remove the pinion flange using the J 8614-01 .
10. Use a container to catch any lubricant.

Important: Do not damage the machined surfaces

11. Pry the oil seal from the bore.
12. Thoroughly clean foreign material from the contact area
13. Replace parts as necessary.

Tools Required

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

1. Lubricate the cavity between the lips of the new seal with a high melting point lubricant.
2. Install the oil seal into the bore using the J 24384 .




Important: Do not hammer the pinion flange (2) onto the pinion stem.

3. Install the pinion flange using the alignment marks (1) as a reference
4. Install the washer and a new pinion nut.

•	Tighten the pinion nut on the pinion stem as close to the alignment mark (1) as possible without going past the mark

•	Use the alignment mark and the thread count as a reference

•	Tighten the nut a little at a time and turn the pinion flange (2) several times after each tightening in order to set the rollers





Important: If the recorded preload torque value was less than 3 lb in, reset the torque specification to 3-5 lb in.

5. Measure the torque required to rotate the pinion.

•	Compare the rotating torque with the recorded value

•	Continue tightening the pinion nut and measuring the torque until the recorded value is achieved

6. Align the propeller shaft with the alignment marks.
7. Connect the propeller shaft. Refer to Propeller Shaft Replacement - One Piece , Two-Piece Propeller Shaft Replacement , or Three-Piece Propeller Shaft Replacement .
8. Install the retainers and bolts.

Tighten
Tighten the bolts to 20 N·m (15 lb ft).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

9. Add lubricant to the rear axle as necessary. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.

Pinion Oil Seal Replacement 11 Inch Ring Gear

Tools Required

The pinion oil seal and the pinion flange may be replaced with the carrier assembly installed in the vehicle.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Disconnect the propeller shaft. Refer to the following procedures:

•	Propeller Shaft Replacement

•	Two-Piece Propeller Shaft Replacement

•	Three-Piece Propeller Shaft Replacement




3. Make an alignment mark (1) on the following components for use as an installation guide:

•	The pinion stem

•	The pinion nut

•	The pinion flange (2)




4. Remove the pinion nut using J 8614-01 .



5. Remove the flange using J 8614-01 with the special nut and forcing screw.
6. Pry the oil seal from the bore.

•	Do not damage the machined surfaces

•	Clean any foreign material from the contact area

7. Inspect the following:

•	The oil seal mating surfaces for any burrs which may cause seal failure

•	The flange deflector for any abnormality such as cracking or distortion

8. Replace the components as necessary.

Tools Required

1. Lubricate the inside diameter of the new oil seal with extreme pressure lubricant such as GM P/N 9985038.



2. Install the oil seal into the bore using the J 24384 .

Important: Do not coat the bearing.

3. Pack the cavity between the following components with a non-hardening sealer such as Permatex® Type A or the equivalent:

•	The pinion stem

•	The pinion flange

•	The pinion nut




4. Install the pinion flange using the J 8614-01 and use the alignment marks as a guide.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the pinion nut using the J 8614-01 and use the alignment marks as a guide.

Tighten
Tighten the pinion nut to 596-678 N·m (440-550 lb ft).

6. Install the propeller shaft. Refer to the following procedures:

•	Propeller Shaft Replacement

•	Two-Piece Propeller Shaft Replacement

•	Three-Piece Propeller Shaft Replacement