Main Shaft Assembly: Disassembly

WARNING: This page is about a different car, the 2020 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Put vinyl tape around main shaft spline to protect the oil seal from damage. Then pull out the oil seal and needle bearing by hand.
Remove the lock nut and lock washer using ST1 and ST2.
NOTE: Flatten the lock nut tab before removing the lock nut.

Preparation tool:

ST1: TRANSMISSION HOLDER (498937000)

ST2: SOCKET WRENCH (35) (499987003)

Courtesy of SUBARU OF AMERICA, INC.
Remove the 5th hub & sleeve No. 2, baulk lever, 5th baulk ring, and 5th drive gear & needle bearing.

Courtesy of SUBARU OF AMERICA, INC.
Using ST1 and ST2, remove the rest of the parts.

CAUTION:

When replacing the sleeve & hub, replace them as a set.
Do not disassemble the sleeve & hub the engaging point is pre-determined.
If it is necessary to disassemble, mark the engaging points on the splines beforehand.

Preparation tool:

ST1: REMOVER (899864100)

ST2: REMOVER (899714110)

Courtesy of SUBARU OF AMERICA, INC.