Drive Pinion Shaft Assembly: Disassembly

Flatten the lock nut tab, and then remove the lock nut while holding the rear spline part of the drive pinion shaft using ST1 and ST2. Pull out the drive pinion collar.
ST1 498937110 HOLDER

ST2 499787700 WRENCH

ST3 499787500 ADAPTER

Fig 1: Removing Lock Nut Using ST1 498937110 Holder And ST2 499787700 Wrench
Courtesy of SUBARU OF AMERICA, INC.
Remove the O-ring.
Separate the rear roller bearing and outer race from the drive pinion shaft using a press.

Fig 2: Identifying Outer Race
Courtesy of SUBARU OF AMERICA, INC.
Separate the front roller bearing from the drive pinion shaft using a press and the ST.
ST 498517000 REPLACER

Fig 3: Separating Front Roller Bearing From Drive Pinion Shaft Using ST 498517000 Replacer
Courtesy of SUBARU OF AMERICA, INC.