Preparation for Overhaul: Procedure

Clean oil, grease, dirt and dust from the transmission.
When transmission gear oil remains in the transmission, using the TORX® bit T70 to remove the drain plug, and drain the gear oil completely.
Replace the gasket with a new part and install the drain plug using the TORX® bit T70.
Tightening torque:

44 N.m (4.5kgf-m, 32.5ft-lb) (aluminum gasket, silver)

70 N.m (7.1kgf-m, 51.6ft-lb) (copper gasket, brown)

70 N.m (7.1kgf-m, 51.6ft-lb) (metal gasket, black)

Courtesy of SUBARU OF AMERICA, INC.
Install the transmission to the ST.
Special tool:

ST: 499937100 TRANSMISSION STAND

Courtesy of SUBARU OF AMERICA, INC.
Apply transmission gear oil to rotating parts before assembly.
All disassembled parts, if to be reused, should be reinstalled in the original positions.
Gaskets, lock washers and lock nuts must be replaced with new ones.
Apply liquid gasket to the specified areas to prevent leakage.