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
Reverse Brake: Removal
- Remove the primary pulley and secondary pulley. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>PRIMARY PULLEY AND SECONDARY PULLEY>REMOVALΒ .
- Remove the manual valve body and separator plate.
- Remove the oil guide.
- Perform the following measurement, when replacing the reverse brake housing or the drive pinion retainer.NOTE: It is not necessary when the primary pulley and secondary pulley are replaced.
- Measure and record the thickness of primary pulley shim.
- Using the ST, measure the height "H1" from the ST end face to the primary pulley bearing catch surface.NOTE: Measure at four points and calculate the average.
Preparation tool:Β
ST: GAUGE (499575400)
- Measure the height "H2" from the ST end face to the secondary pulley bearing catch surface.NOTE: Measure at four points and calculate the average.
- Using the following calculation, measure and record the dimension "A" from the primary pulley bearing catch surface to the secondary pulley bearing catch surface.
A = H2 - H1
A Dimension (mm (in)) from the primary pulley bearing catch surface to the secondary pulley bearing catch surface H1 Measured value (mm (in)) of step (2) H2 Measured value (mm (in)) of step (3)
- Remove the reverse brake housing.
- Remove the washer.
- Remove the thrust bearing.
- Remove the O-rings.
- Remove the planetary gear and forward clutch drum as a single unit.
- Remove the thrust bearing.NOTE: The thrust bearing may be removed together with the forward clutch drum.
- Remove the seal rings.
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
