Side Retainer

Install a new oil seal. (Non-TURBO model)
ST 49979700 INSTALLER

Fig 1: Installing Oil Seal Using Installer ST49979700 (Non-TURBO Model)
Courtesy of SUBARU OF AMERICA, INC.
Install a new oil seal. (TURBO model)
ST 18675AA000 DIFFERENTIAL OIL SEAL INSTALLER

Fig 2: Installing Oil Seal Using Differential Oil Seal Installer ST18675AA000 (TURBO Model)
Courtesy of SUBARU OF AMERICA, INC.
Install a new O-ring.
NOTE: Do not stretch or damage the O-ring.

Fig 3: Identifying O-Ring
Courtesy of SUBARU OF AMERICA, INC.