Reduction Driven Gear: Removal

Remove the transmission assembly from the vehicle. Refer to REMOVAL , Automatic Transmission Assembly.
Remove rear vehicle speed sensor, and separate the transmission case and extension case. Refer to REMOVAL , Extension Case.
Set the range select lever to "P".
Straighten the staked portion, and remove the lock nut.

Fig 1: Removing Lock Nut
Courtesy of SUBARU OF AMERICA, INC.
Using the ST1 and ST2, extract the reduction driven gear.
ST1 499737000 PULLER

ST2 899524100 PULLER SET

Fig 2: Removing Reduction Driven Gear
Courtesy of SUBARU OF AMERICA, INC.