Drive Pinion Shaft Assembly: Disassembly

Flatten the lock nut tab, then remove the lock nut while holding the rear spline part of the shaft using ST1, ST2 and ST3. Pull out the drive pinion collar.
ST1 18667AA010 HOLDER

ST2 499787700 WRENCH

ST3 499787500 ADAPTER

Fig 1: Removing Lock Nut Using Special Tools
Courtesy of SUBARU OF AMERICA, INC.
Remove the O-ring.
Separate the rear roller bearing and outer race from shaft using a press.

Fig 2: Removing Shaft Outer Race Using Press
Courtesy of SUBARU OF AMERICA, INC.
Separate the front roller bearing from the shaft using a press and ST.
ST 498517000 REPLACER

Fig 3: Removing Front Roller Bearing From Shaft Using Replacer
Courtesy of SUBARU OF AMERICA, INC.