Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE
Front Differential: Disassembly
WARNING: This page is about a different variant/trim than selected.
NOTE:
When replacing the side bearing, always replace it together with inner race and outer race.
- Remove the side bearing inner race using ST1 and ST2.
Preparation tool:
ST1: PULLER ASSY (399703600)
ST2: SEAT (398497701)
- Using the ST, remove the spring pin.
Preparation tool:
ST: STRAIGHT PIN REMOVER (899904100)
- Remove the pinion shaft, and remove the differential bevel pinion, differential bevel gear and thrust washer.
- Remove the side bearing outer race using the ST.
Preparation tool:
ST: PULLER ASSY (398527700)
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.