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 Ascent BaseFACTORY OEM SERVICE PROCEDURE
Differential Side Retainer
NOTE:
After adjusting the backlash and tooth contact of the hypoid gear set, replace the differential side retainer oil seal and O-ring with new parts.
- Remove the O-rings.
- Remove the differential side retainer oil seal.
- Remove the split pin (ST), and then remove the claw.
Preparation tool:
ST: PULLER ASSY (398527700)
- Attach two claws to the side bearing outer race, and set the ST to the differential side retainer.
Preparation tool:
ST: PULLER ASSY (398527700)
- Restore the removed claws to the original positions, and install the pin and split pin.
- Hold the shaft (ST) to avoid detachment from the differential side retainer, and remove the side bearing outer race.
Preparation tool:
ST: PULLER ASSY (398527700)
NOTE: Replace the side bearing inner race and side bearing outer races as a single unit.
Factory Service Tools
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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.