Project 2015 Outback: Wheel Bearing & CV Axle Replacement! Again! No More Noise, For Real This Time!

Introduction

In this tutorial, we'll guide you through the process of replacing the wheel bearing and CV axle on a 2015 Subaru Outback. This repair is crucial for resolving issues like clicking noises when turning and roaring sounds while driving. Following these steps will help ensure a quiet and smooth ride.

Step 1: Gather Necessary Tools and Parts

Before you start, make sure you have the following tools and parts ready:

Tools Needed

• Jack and jack stands
• Socket set (including 12mm, 14mm, 17mm, and 10mm sockets)
• Torque wrench
• Pry bar
• Wire brush
• Mallet
• Brake parts cleaner

Parts Needed

• New CV axle
• New wheel hub bearing assembly
• New axle seal
• New CV axle nut (part number: 902170049)

Step 2: Prepare the Vehicle

1. Lift the Vehicle: Use a jack to lift the front of the Outback and secure it on jack stands.
2. Remove the Wheel: Take off the wheel using a lug wrench.

Step 3: Remove Brake Components

1. Loosen and Remove the CV Axle Nut: Use an appropriate socket to remove the nut.
2. Disconnect the Brake Caliper:
   • Remove the 12mm bolt holding the brake line to the strut.
   • Use a 17mm socket to remove the caliper bracket bolts.
   • Take off the caliper and hang it out of the way.
3. Remove the Brake Rotor: Simply pull it off and set it aside.
4. Remove the Brake Dust Shield: Unscrew the 12mm bolts holding it in place.

Step 4: Disconnect the Wheel Speed Sensor

1. Unplug the Sensor: Use a 10mm socket to remove the bolt securing the wheel speed sensor.
2. Tuck the Sensor Away: Clip it up to keep it out of the way.

Step 5: Remove the Old CV Axle

1. Loosen the Ball Joint:
   • Use a 14mm socket to loosen the pinch bolt.
   • Use a pry bar to pop the ball joint out of the spindle.
2. Remove the CV Axle:
   • Pull the axle out of the hub assembly.
   • Carefully guide it out from the transmission/differential.

Step 6: Replace the Wheel Hub Assembly

1. Remove the Hub Assembly: Unbolt the four 14mm bolts holding the hub assembly in place. Use a puller if necessary.
2. Clean the Area: Remove any rust or debris from the mounting surface.

Step 7: Install New Parts

1. Install the New Axle Seal:
   • Use a pry bar to remove the old seal.
   • Tap the new seal into place using a mallet.
2. Install the New Hub Bearing Assembly:
   • Position the new hub assembly and bolt it in with the four 14mm bolts.
   • Torque the bolts to 65 Newton-meters.
3. Install the New CV Axle:
   • Line it up with the splines and push it into place until it clicks.

Step 8: Reassemble Brake Components

1. Reattach the Ball Joint: Insert the ball joint back into the spindle and insert a new pinch bolt. Torque it to 50 Newton-meters.
2. Reinstall the Brake Dust Shield: Position and bolt it back in place.
3. Reinstall the Brake Rotor: Slide it back onto the hub.
4. Reattach the Brake Caliper:
   • Swing it back into position and torque the bolts to 120 Newton-meters.
5. Reattach the Brake Hose Bracket: Secure it as it was originally.

Step 9: Final Assembly

1. Install the New CV Axle Nut: Torque it to 220 Newton-meters. Use a tool to hold the brake rotor in place if needed.
2. Stake the Nut: Use a punch to secure the nut to the axle.
3. Reattach the Wheel: Put the wheel back on and torque the lug nuts to 120 Newton-meters.

Conclusion

Congratulations! You've successfully replaced the wheel bearing and CV axle on your 2015 Subaru Outback. This repair should eliminate the noises and restore a smooth ride. Make sure to check all your work and take the vehicle for a test drive to ensure everything is functioning correctly. Happy driving!