Side Retainer

Install a new oil seal.
ST 18675AA000 DIFFERENTIAL SIDE OIL SEAL INSTALLER

Fig 1: Identifying ST 18675AA000 Differential Side Oil Seal Installer
Courtesy of SUBARU OF AMERICA, INC.
CAUTION:
- When press-fitting the oil seal to the side retainer, tap with a plastic hammer etc. to press in.
- Never use a press.
Install a new O-ring.
NOTE: Do not stretch or damage the O-ring.

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