Removal & Installation
Do not attempt to remove the wheel speed sensor ring from the axle shaft, or improper ABS/TCS operation may result.
Before servicing the vehicle, refer to the Precautions Section.
NOTEDisconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.
NOTEIf working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.
NOTEFor vehicles equipped with OnStar (RPO UE1), with battery backup, the backup battery is a redundant power supply to allow limited ONStar functionality in the event of a main battery power disruption to the OnStar module (VCIM). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled by opening the driver-s side door before disconnecting power. Disconnecting power to the module in any way while the ignition is ON or with the retained accessory power activated may cause activation of the OnStar backup battery system and will discharge and permanently damage the backup battery. Once the backup battery is activated it will stay on until it has completely discharged. The backup battery is not rechargeable and once it is activated, it must be replaced.
- Disconnect the negative battery cable.
- Raise and safely support the vehicle.
- Remove the tire and wheel assembly.
- Remove the brake drum.
- Drain the gear oil.
- Remove the carrier cover. Discard the gasket.
- Remove the pinion shaft lock bolt and pinion shaft.
- Push the flanged end of the axle shaft into the axle housing. Remove the -C- lock from the button end of the shaft.
- Remove the axle shaft from the housing. Use care not to damage the oil seal.
Using tools J2619, J2619-4, J22813-01, J23765 and J23771 remove the axel shaft bearing and oil seal from the axle housing.
Be sure to use new fasteners, as required.
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 sealer are identified. 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.
- Installation is the reverse of the removal procedure.
- Tighten the lock bolt to 20 ft. lbs.
- Tighten the carrier retaining bolts to 22 ft. lbs. Be sure to use a new gasket.
- Using the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.