WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.
Using a press, install a new ball bearing to reduction driven gear.
Fig 1: Installing New Ball Bearing To Reduction Driven Gear
Courtesy of SUBARU OF AMERICA, INC.
Install snap ring to reduction driven gear.
Fig 2: Installing Snap Ring To Reduction Driven Gear