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.

2008 Subaru Outback Base, AutomaticFACTORY OEM SERVICE PROCEDURE

VTD Model

Using ST1, ST2, ST3 and a press, remove the snap ring.
ST1 398673600 COMPRESSOR

ST2 498627100 SEAT

ST3 398663600 PLIER

Fig 1: Removing/Installing Snap Ring
Courtesy of SUBARU OF AMERICA, INC.
Remove the test plug.

Fig 2: Identifying Test Plug
Courtesy of SUBARU OF AMERICA, INC.
Send in compressed air, and remove the multi-plate clutch (LSD) piston.

Fig 3: Locating Multi-Plate Clutch (LSD) Piston
Courtesy of SUBARU OF AMERICA, INC.
Remove the multi-plate clutch pipe while being careful not to deform the pipe.

Fig 4: Identifying Multi-Plate Clutch Pipe
Courtesy of SUBARU OF AMERICA, INC.
Remove the dust cover from extension case.
Remove the oil seal from the extension case.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

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.