GMC 23455948 Rear Wheel Bearing

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To remove and install a rear hub assembly, first remove the axleshaft and rear wheels, then remove the brake disc and retaining ring/key from the end of the axle housing. Use a special socket to remove the adjusting nut and pull the hub assembly straight off the axle tube. Discard the oil seal and clean and inspect all components for wear or damage. Disassemble the hub further if necessary, then clean and reassemble using new bearing cups and lubricating with wheel bearing grease. To install, place the hub assembly on the axle tube and adjust the bearings by tightening the adjusting nut to 50 ft-lbs, then backing it off and tightening it hand-tight. Install the key and retaining ring, and ensure there is no play in the hub assembly before reinstalling the axleshaft and lowering the vehicle.

The old bearing can be extracted from the housing using a bearing puller and slide hammer.

1. Loosen the wheel lug nuts. 2. Raise the vehicle. 3. Place it securely on jackstands. 4. Remove the left front wheel. 5. Remove the differential carrier splash shield from under the front axle. 6. Remove the left driveaxle. 7. Drain the lubricant from the front differential. 8. Pull the left axle shaft out with a slide hammer and adapter. 9. Remove the deflector and seal from the differential. 10. Remove the bearing using a slide hammer and bearing remover attachment.

Install the wheel speed sensor, brake disc, caliper mounting bracket, and caliper.

Before reinstalling the axleshaft and lowering the vehicle, it should be ensured that there is no play in the hub assembly.

The initial steps to remove and install components in the front differential of selectable 4WD systems are as follows: Loosen the wheel lug nuts. Raise the vehicle securely on jackstands. Remove the right front wheel. Remove the differential carrier splash shield if equipped. Drain the lubricant from the front differential. For 4WD systems, unbolt the right driveaxle from the axleshaft flange and support it out of the way. Remove the front axle shift motor and, if applicable, disconnect the front stabilizer link or remove the front shock absorber/coil spring assembly. On 2500/3500 models, remove the front axle bracket bolts and slide the bracket forward for additional clearance. Support the differential carrier with a floor jack and a block of wood.

After cleaning and inspecting the components, the hub should be reassembled using new bearing cups and lubricating with wheel bearing grease.

The hub assembly can be removed from the axle tube by using a special socket to remove the adjusting nut and pulling the hub assembly straight off the axle tube.

To remove and install components in the front differential for AWD systems, follow these steps: Remove the stabilizer bar link and, if applicable, the front shock absorber. Unbolt the right driveaxle from the axleshaft flange, supporting it properly. Support the differential carrier with a floor jack and a block of wood. Remove nuts attaching the axle shaft to its support bracket and the bolts securing the axle shaft flange to the differential carrier. Use a brass punch and hammer to separate the axle shaft from the differential case side gear. Remove the inner axle shaft assembly and axle shaft. Replace the inner seal and bearing with a special tool, then apply RTV sealant to the differential sealing surface and install the inner axle shaft housing assembly. Install the axle shaft to the support bracket and align the splines with the differential side gear. Tap the axle shaft with a mallet until the ring (clip) aligns with the groove in the differential case side gear. Install the axle shaft to the inner flange and tighten the bolts. Reinstall the stabilizer link, fill the differential with lubricant, install the differential carrier splash shield, and finally, install the wheel and lug nuts. Lower the vehicle, tighten the lug nuts, and check for proper operation.

1. Loosen the wheel lug nuts. 2. Raise the vehicle. 3. Place it securely on jackstands. 4. Remove the left front wheel. 5. Remove the differential carrier splash shield from under the front axle. 6. Remove the left driveaxle. 7. Drain the lubricant from the front differential. 8. Pull the left axle shaft out with a slide hammer and adapter. 9. Remove the deflector and seal from the differential. 10. Remove the bearing using a slide hammer and bearing remover attachment.

Remove the hub retaining bolts from the steering knuckle and remove the disc shield.

The new bearing can be installed using a bearing installer or a piece of pipe against the outer race.