Drive Pinion Flange/Yoke and/or Oil Seal Replacement (10.5 Inch Axle)
Drive Pinion Flange/Yoke and/or Oil Seal Replacement (10.5 Inch Axle)
Tools Required
* J 8614-01 Flange/Pulley Holding Tool
* J 44414 Rear Axle Pinion Oil Seal Installer
Removal Procedure
Important: 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. Remove the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation (Service and Repair) .
3. Remove the rear wheel axle shafts. Refer to Rear Axle Shaft and/or Gasket Replacement (Rear Axle Shaft and/or Gasket Replacement) .
4. Remove the propeller shaft from the vehicle. Refer to Rear Propeller Shaft Replacement (Service and Repair)
5. Using an inch-pound torque wrench, measure the amount of torque required to rotate the pinion. Record this measurement for reassembly. This will give the combined preload for the following components:
* The pinion bearings
* The pinion pilot bearing
* The pinion oil seal
* The differential case bearings
6. Place an alignment mark between the pinion and the pinion yoke.
7. Install the J 8614-01 as shown.
8. Remove the pinion nut while holding the J 8614-01 .
9. Remove the washer.
10. Install the J 8614-2 (2) and the J 8614-3 (3) into the J 8614-01 (1) as shown.
11. Remove the pinion yoke by turning the J 8614-3 (3) clockwise while holding the J 8614-01 (1).
12. Using a suitable tool, remove the drive pinion seal (1).
Installation Procedure
1. Using the J 44414 , install a new pinion oil seal.
2. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the splines of the pinion yoke.
3. Install the drive pinion yoke.
Align the marks made during removal.
Notice: Refer to Pinion Flange/Yoke Installation Notice .
4. Using a soft faced hammer, tap the drive pinion yoke onto the pinion shaft until a few of the threads show through the yoke.
5. Install the washer and a new pinion nut.
6. Install the J 8614-01 onto the pinion yoke as shown.
Notice: Refer to Fastener Notice .
Important: If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
7. Tighten the pinion nut while holding the J 8614-01 .
Tighten the nut until the pinion end play is just taken up. Rotate the pinion while tightening the nut to seat the bearings.
8. Using an inch-pound torque wrench, measure the rotating torque of the pinion. Compare this measurement with the rotating torque recorded during removal.
Tighten the nut in small increments, as needed, until the rotating torque is 0.40-0.57 N.m (3- 5 lb in) greater than the rotating torque recorded during removal.
9. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated. Recheck the rotating torque and adjust if necessary.
10. Install the propeller shaft assembly. Refer to Rear Propeller Shaft Replacement (Service and Repair) .
11. Install the axle shafts. Refer to Rear Axle Shaft and/or Gasket Replacement (Rear Axle Shaft and/or Gasket Replacement) .
12. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation (Service and Repair) .
13. Inspect and add axle lubricant to the axle housing, if necessary. Refer to Rear Axle Lubricant Level Inspection (8.6 Inch Axle) (Rear Axle Lubricant Level Inspection (8.6 Inch Axle))Rear Axle Lubricant Level Inspection (9.5LD Inch Axle) (Rear Axle Lubricant Level Inspection (9.5LD Inch Axle))Rear Axle Lubricant Level Inspection (10.5 inch Axle) (Rear Axle Lubricant Level Inspection (10.5 Inch Axle)) .
14. Remove the support and lower the vehicle.