GM 9439561 Rear Wheel Bearing

For front wheel or wheel bearing looseness in front wheel drive vehicles, torque lug nuts and axle nuts to specification and recheck for looseness. If the wheel bearing is worn or damaged, it should be replaced. If the wheel bearing is out of adjustment, adjust it to specification; if it remains loose, replacement is necessary. For rear wheel or wheel bearing looseness in front wheel drive vehicles, adjust the wheel bearing to specification; if it is still loose, replace it. Additionally, torque lug nuts to specification and recheck for looseness, and replace the wheel bearing if it is worn or damaged.

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.

To remove and replace a bearing in an axle housing, first remove the axleshaft and oil seal. Use a bearing puller and slide hammer to extract the old bearing from the housing. Clean out the recess and install the new bearing using a bearing installer or a piece of pipe against the outer race. Ensure the bearing is tapped in fully. Finally, install a new oil seal and re-install the axleshaft.

Use solvent to thoroughly clean the bearings, hub, and spindle, ensuring no brush bristles embed in the bearing rollers.

The new bearing can be driven in with a bearing installer or a piece of pipe positioned against the outer bearing race.

A bearing puller that grips the bearing from behind is required, typically using a slide hammer and axleshaft bearing remover attachment.

To disassemble the hub further, use a hammer and a long bar or drift punch to knock out the inner bearing, cup, and oil seal, then remove the outer retaining ring and knock the outer bearing and cup from the hub.

Use a screwdriver to pry the seal out of the rear of the hub, remove the inner wheel bearing, and use solvent to clean all traces of old grease from the bearings, hub, and spindle, allowing the parts to air dry.

A slide hammer should be attached to the puller to extract the bearing from the axle housing.

Install the grease-packed inner bearing, a new seal, and the outer bearing, then secure with the washer and spindle nut.

The final step is to install a new oil seal and re-install the axleshaft.

After removing the old bearing, the recess should be cleaned out.

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

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.

1. Install the bearing with the square shoulder facing in, using a bearing driver or a socket with an outside diameter slightly smaller than that of the bearing. 2. Install a new seal and deflector, lubricating the lips of the seal with multi-purpose grease. 3. Carefully drive in the axle shaft with a soft-face hammer. 4. Fill the differential with the proper lubricant. 5. Install the driveaxle and differential carrier splash shield. 6. Install the wheel and lug nuts. 7. Lower the vehicle. 8. Tighten the lug nuts to the proper torque specifications. 9. Check for proper operation.

After discarding the oil seal, all components should be cleaned and inspected for wear or damage.

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.

To remove and install components in the front differential for 4WD systems, follow these steps: Remove the bolts securing the axle tube to the differential carrier and the nuts attaching the tube to its support bracket. Carefully remove the output shaft tube, ensuring no components fall out. Mount the tube in a vise and remove the internal components. Measure and remove the axleshaft bearing using a slide hammer and bearing remover attachment. For installation, install the bearing to the original depth using a bearing driver or socket, then install a new seal and deflector, lubricating the seal lips with grease. Carefully drive in the axleshaft, followed by the internal components. Apply RTV sealant to the tube-to-differential housing mating surface, and install the tube assembly, tightening bolts and nuts to specified torques. Reinstall the driveaxle, front axle shift motor, and fill the differential with lubricant.

Install the bearing with the square shoulder facing in, using a bearing driver or a socket with an outside diameter slightly smaller than that of the bearing.

1. Install the bearing with the square shoulder facing in, using a bearing driver or a socket with an outside diameter slightly smaller than that of the bearing. 2. Install a new seal and deflector, lubricating the lips of the seal with multi-purpose grease. 3. Carefully drive in the axle shaft with a soft-face hammer. 4. Fill the differential with the proper lubricant. 5. Install the driveaxle and differential carrier splash shield. 6. Install the wheel and lug nuts. 7. Lower the vehicle. 8. Tighten the lug nuts to the proper torque specifications. 9. Check for proper operation.

It should be ensured that the new bearing is tapped in fully.

To remove and install components in the front differential for 4WD systems, follow these steps: Remove the bolts securing the axle tube to the differential carrier and the nuts attaching the tube to its support bracket. Carefully remove the output shaft tube, ensuring no components fall out. Mount the tube in a vise and remove the internal components. Measure and remove the axleshaft bearing using a slide hammer and bearing remover attachment. For installation, install the bearing to the original depth using a bearing driver or socket, then install a new seal and deflector, lubricating the seal lips with grease. Carefully drive in the axleshaft, followed by the internal components. Apply RTV sealant to the tube-to-differential housing mating surface, and install the tube assembly, tightening bolts and nuts to specified torques. Reinstall the driveaxle, front axle shift motor, and fill the differential with lubricant.

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.