Side Retainer

WARNING: This page is about a different car, the 2006 Subaru Outback and 2006 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

Install the bearing outer race to side retainer.
Install a new oil seal using the ST and a hammer.
ST 18675AA000 DIFFERENTIAL SIDE OIL SEAL INSTALLER

Fig 1: Identifying Bearing Outer Race
Courtesy of SUBARU OF AMERICA, INC.
Apply gear oil to a new O-ring and install.

Fig 2: Identifying O-ring
Courtesy of SUBARU OF AMERICA, INC.