Replace That Squeaky Wheel Bearing: How To Change Your Subaru Legacy's Rear Wheel Bearing

Summary

Use the 12-point 12mm socket to remove the two bolts holding the rotor to the hub.
Use the 19mm socket to remove the four bolts holding the hub assembly to the knuckle.
Replacing rear wheel bearings on a Subaru Legacy is a relatively straightforward process that can be completed in a few hours.

Maintaining your Subaru Legacy’s wheel bearings is crucial for ensuring a smooth and safe ride. If you’re experiencing humming or grinding noises coming from the rear wheels, you may need to replace the wheel bearings. This comprehensive guide will provide you with step-by-step instructions on how to change rear wheel bearings on a Subaru Legacy.

Materials Required

New rear wheel bearing assembly
17mm socket
19mm socket
12-point 12mm socket
12-point 14mm socket
Torque wrench
Pry bar
Hammer
Grease
Safety glasses

Safety Precautions

Park the vehicle on a level surface and engage the parking brake.
Place wheel chocks behind the front wheels.
Wear safety glasses to protect your eyes from debris.

Step-by-Step Instructions

1. Remove the Wheel

Use the 17mm socket to loosen the lug nuts on the rear wheel.
Lift the vehicle using a jack and support it with jack stands.
Remove the lug nuts and take off the wheel.

2. Remove the Brake Caliper

Use the 12-point 14mm socket to remove the two bolts holding the brake caliper.
Lift the caliper off the rotor and secure it to the suspension with a bungee cord or wire.

3. Remove the Rotor

Use the 12-point 12mm socket to remove the two bolts holding the rotor to the hub.
Pull the rotor straight off the hub.

4. Remove the Hub Assembly

Use the 19mm socket to remove the four bolts holding the hub assembly to the knuckle.
Pull the hub assembly straight out of the knuckle.

5. Remove the Old Bearing

Use a pry bar to carefully pry the old bearing out of the hub assembly.
Be careful not to damage the hub assembly.

6. Install the New Bearing

Apply a thin layer of grease to the new bearing.
Carefully insert the new bearing into the hub assembly.
Use a hammer to gently tap the bearing into place.

7. Reinstall the Hub Assembly

Reinsert the hub assembly into the knuckle.
Hand-tighten the four bolts holding the hub assembly in place.
Use a torque wrench to tighten the bolts to the manufacturer’s specifications.

8. Reinstall the Rotor

Place the rotor onto the hub assembly.
Hand-tighten the two bolts holding the rotor in place.
Use a torque wrench to tighten the bolts to the manufacturer’s specifications.

9. Reinstall the Brake Caliper

Position the brake caliper over the rotor.
Hand-tighten the two bolts holding the caliper in place.
Use a torque wrench to tighten the bolts to the manufacturer’s specifications.

10. Reinstall the Wheel

Place the wheel onto the hub.
Hand-tighten the lug nuts.
Lower the vehicle and use the 17mm socket to tighten the lug nuts to the manufacturer’s specifications.

Tips

Use a new rear wheel bearing assembly to ensure proper fit and performance.
Apply a thin layer of grease to the new bearing to reduce friction and extend its lifespan.
Torque all bolts to the manufacturer’s specifications to prevent overtightening or undertightening.
If you’re not comfortable performing this repair, consult a qualified mechanic.

Troubleshooting

Humming or grinding noises: This can indicate worn or damaged wheel bearings.
Vibration in the rear wheels: This can also be caused by worn wheel bearings.
Difficulty turning or steering: This can be a sign of severe wheel bearing damage.

Final Note

Replacing rear wheel bearings on a Subaru Legacy is a relatively straightforward process that can be completed in a few hours. By following the steps outlined in this guide and taking the necessary safety precautions, you can ensure a smooth and safe ride.

Replace That Squeaky Wheel Bearing: How to Change Your Subaru Legacy’s Rear Wheel Bearing