Sierra Classic 2500 4WD V8-8.1L (2007)
Removal Procedure
1. 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.
Raise the vehicle. Refer to Vehicle Lifting.
2. Drain the axle lubricant. Refer to Rear Axle Lubricant Replacement.
3. Remove the axle shafts. Refer to Rear Axle Shaft and/or Gasket Replacement.
4. Reference mark the rear propeller shaft (3) to the rear axle pinion yoke (4).
5. Disconnect the propeller shaft from the axle. Wrap the bearing caps with tape in order to prevent the loss of bearing rollers. Support the propeller
shaft as necessary.
6. Measure the amount of torque required to rotate the pinion and the ring gear. Use an inch-pound torque wrench. 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
7. Place an alignment mark between the pinion and the pinion yoke.
8. Remove the pinion gear bearing retainer bolts.
9. Remove the pinion gear bearing retainer and the pinion.
10. Remove the selective shim.
