Side Retainer

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Install the bearing outer race to the differential side retainer.
Using the ST, install the differential side retainer oil seal by lightly tapping with a plastic hammer.
CAUTION: Apply differential gear oil to the oil seal lips, and install the oil seal while being careful not to deform the lip.

NOTE: Use a new oil seal.
ST 18675AA000 DIFFERENTIAL SIDE OIL SEAL INSTALLER

Fig 1: Installing Differential Side Retainer Oil Seal Using ST
Courtesy of SUBARU OF AMERICA, INC.
Apply gear oil to the O-ring and install.
NOTE:
- Use new O-rings.
- Apply gear oil to O-ring.
  
  Fig 2: Side Retainer O-Ring
  Courtesy of SUBARU OF AMERICA, INC.