Drive Pinion Flange/Yoke and/or Oil Seal Replacement Except Dana 286 Axle, Input Shaft

Special Tools

1. Apply the parking brake.
2. Block the wheels.
3. Remove the rear axle rear unit propeller shaft. Refer to the following list in order to select the correct procedure:

•	One-Piece Rear Propeller Shaft Replacement

•	Two-Piece Rear Propeller Shaft Replacement

•	Three-Piece Rear Propeller Shaft Replacement

•	Four-Piece Rear Propeller Shaft Replacement

•	Tandem Axle Propeller Shaft Replacement

4. Install the J 3453 over the pinion yoke flange.
5. Remove the inter-axle differential input shaft nut and the washer.



6. Using the J 8614-01 , remove the inter-axle differential input shaft yoke (1).
7. Remove the inter-axle differential input shaft seal.
8. Inspect the inter-axle differential input shaft seal surface for damage or scoring. If the seal surface is damaged, replace the inter-axle differential input shaft yoke.

Note: Lubricate the new inter-axle differential input shaft seal lip with the rear axle lubricant. For rear axle lubricant specifications, refer to Fluid and Lubricant Recommendations.

1. Apply Silicone Sealer (RTV) GM P/N 1052366, (Canadian P/N 10953492), or equivalent to OD of the inter-axle differential input shaft seal.

The silicone sealer will overcome minor faults in the differential carrier seal bore.




2. Install the inter-axle differential input shaft seal.



3. Install the inter-axle differential input shaft yoke.

Caution: Refer to Fastener Caution in the Preface section.

Note: 

•	Ensure that the threads are clean and free of grease.

•	Apply 272 Threadlocker GM P/N 12345493, (Canadian P/N 10953488), or equivalent to the threads of the inter-axle differential input shaft nut.

4. Install the washer and the new inter-axle differential input shaft nut.

Tighten
Install the J 3453 to secure the yoke and tighten the inter-axle differential input shaft nut to 867 N·m (639 lb ft).

5. If a new inter-axle differential input shaft nut with pre-applied threadlocker is unavailable, the original inter-axle differential input shaft nut may be reused under the following conditions:

•	The nut is in good condition.

•	The threadlocker is applied.

6. Install the rear axle rear unit propeller shaft. Refer to the following list in order to select the correct procedure:

•	One-Piece Rear Propeller Shaft Replacement

•	Two-Piece Rear Propeller Shaft Replacement

•	Three-Piece Rear Propeller Shaft Replacement

•	Four-Piece Rear Propeller Shaft Replacement

•	Tandem Axle Propeller Shaft Replacement

7. Remove the wheel blocks.

Drive Pinion Flange/Yoke and/or Oil Seal Replacement Except Dana 286 Axle, Output Shaft

Special Tools

1. Apply the parking brake.
2. Block the wheels.
3. Remove the differential Differential Replacement.
4. Remove the propeller shaft. Refer to the following procedures:

•	One-Piece Rear Propeller Shaft Replacement

•	Two-Piece Rear Propeller Shaft Replacement

•	Three-Piece Rear Propeller Shaft Replacement

•	Four-Piece Rear Propeller Shaft Replacement

•	Tandem Axle Propeller Shaft Replacement




5. Using the J 3453 to secure the yoke, remove the inter-axle differential output shaft nut and washer.
6. Using the J 7804-A , remove the inter-axle differential output shaft yoke.
7. Remove the inter-axle differential output shaft seal.
8. Inspect the inter-axle differential output shaft yoke seal surface for damage or scoring. If the seal surface is damaged, replace the rear propeller shaft yoke.

Note: Lubricate the new inter-axle differential output shaft seal lip with the rear axle lubricant. For rear axle lubricant specifications, refer to Fluid and Lubricant Recommendations.

1. Apply Silicone Sealer (RTV) GM P/N 1052366 (Canadian P/N 10953492) or equivalent to OD of the inter-axle differential output shaft seal.

The silicone sealer will overcome minor faults in the differential carrier seal bore.




2. Install the inter-axle differential output shaft seal.



3. Install the inter-axle differential output shaft yoke.

Caution: Refer to Fastener Caution in the Preface section.

Note: 

•	Ensure that the threads are clean and free of grease.

•	Apply 272 Threadlocker GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the inter-axle differential input shaft nut.

4. Install the washer and the new inter-axle differential output shaft nut.

Tighten
Using the J 3453 to secure the yoke, tighten the inter-axle differential input shaft nut to the torque listed in Fastener Tightening Specifications.

5. If a new inter-axle differential output shaft nut with pre-applied threadlocker is unavailable, the original inter-axle differential output shaft nut may be reused under the following conditions:

•	The nut is in good condition.

•	The threadlocker is applied.

6. Install the differential. Refer to Differential Replacement.
7. Install the propeller shaft. Refer to the following procedures:

•	One-Piece Rear Propeller Shaft Replacement

•	Two-Piece Rear Propeller Shaft Replacement

•	Three-Piece Rear Propeller Shaft Replacement

•	Four-Piece Rear Propeller Shaft Replacement

•	Tandem Axle Propeller Shaft Replacement

8. Remove the wheel blocks.

Drive Pinion Flange/Yoke and/or Oil Seal Replacement Dana 286 Axle

Special Tools

Note: Observe and mark the positions of all the driveline components, relative to the propeller shaft and the axles, prior to disassembly. These components include the propeller shafts, drive axles, pinion flanges, output shafts, etc. Reassemble all the components in the exact places in which you removed the parts. Follow any specifications, torque values, and any measurements made prior to disassembly.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Disconnect the propeller shaft from the rear axle pinion yoke. Refer to Two-Piece Rear Propeller Shaft Replacement or to Three-Piece Rear Propeller Shaft Replacement.
3. Install the J 3453 onto the pinion yoke.
4. Remove the pinion yoke nut while holding the J 3453 .
5. Remove the J 3453 .
6. Remove the washer.
7. Install the J 8614-01 onto the pinion yoke.



8. Install the J 8614-2 (2) and the J 8614-3 (3) into the J 8614-01 (1) as shown.
9. Remove the pinion yoke by turning the J 8614-3 (3) clockwise while holding the J 8614-01 (1).

Use a container in order to retrieve the lubricant.

10. Remove the pinion oil seal. Use a suitable seal removal tool. Do not damage the axle housing.

1. Apply a light coat of axle lubricant GM P/N 12346140 (Canadian P/N 10953492) or equivalent to the lip of the pinion seal.



2. Install the new seal using the J 41696 .
3. Install the pinion yoke.

Caution: If the power steering system has been serviced, an accurate fluid level reading cannot be obtained unless air is bled from the steering system. The air in the fluid may cause pump cavitation noise and may cause pump damage over a period of time.

4. Seat the pinion yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few pinion shaft threads show through the yoke.
5. Install the washer and a new pinion nut.
6. Install the J 3453 onto the pinion yoke.

Caution: Refer to Fastener Caution in the Preface section.

7. Tighten the pinion nut while holding the J 3453 .

Tighten
Tighten the pinion nut to 637 N·m (470 lb ft).

8. Remove the J 3453 .
9. Install the propeller shaft to the rear axle pinion yoke. Refer to Two-Piece Rear Propeller Shaft Replacement or to Three-Piece Rear Propeller Shaft Replacement.
10. Inspect and add axle lubricant to the axle housing, if necessary. Refer to Rear Axle Lubricant Level Inspection.
11. Lower the vehicle.