Side Retainer

Install a new oil seal.
ST 18675AA000 DIFFERENTIAL OIL SEAL INSTALLER
NOTE:
- When pressing fit the oil seal to side retainer, tap it to press fit using a plastic hammer.
- Do not use the press.
Fig 1: Identifying Differential Oil Seal
Courtesy of SUBARU OF AMERICA, INC.
Install a new O-ring.
NOTE: Do not stretch or damage the O-ring.

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