Main Shaft Assembly (Single-Range): Disassembly

Put vinyl tape around the main shaft splines to protect oil seal from damage. Then pull out the oil seal and needle bearing by hand.
Remove the lock nut from transmission main shaft assembly.
NOTE: Remove the caulking before Identifying lock nut.

ST1 498937000 TRANSMISSION HOLDER

ST2 499987003 SOCKET WRENCH (35)

Fig 1: Disassembling Transmission Main Shaft Assembly
Courtesy of SUBARU OF AMERICA, INC.
Remove the 5th-Rev sleeve and hub assembly, 5th bulk ring, 5th drive gear and needle bearing.

Fig 2: Identifying 5th-Rev Sleeve And Hub Assembly
Courtesy of SUBARU OF AMERICA, INC.
Remove the snap ring and synchro cone stopper from 5th-Rev sleeve and hub assembly.

Fig 3: Identifying Snap Ring And Synchro Cone Stopper
Courtesy of SUBARU OF AMERICA, INC.
Using the ST1, ST2 and a press, remove the ball bearing, synchro cone and baulk ring (Rev).
NOTE: Replace the sleeve and hub with new ones. Do not attempt to disassemble because they must engage at a specified point. If they should be disassembled, mark engagement point on splines before-hand.

ST1 499757002 INSTALLER

ST2 498077400 SYNCHRO CONE REMOVER

Fig 4: Identifying Ball Bearing, Synchro Cone
Courtesy of SUBARU OF AMERICA, INC.
Using the ST1 and ST2, remove rest of the parts.
NOTE: Replace the sleeve and hub with new ones. Do not attempt to disassemble because they must engage at a specified point. If they should be disassembled, mark engagement point on splines before-hand.

ST1 899864100 REMOVER

ST2 899714110 REMOVER

Fig 5: Identifying ST1 And ST2
Courtesy of SUBARU OF AMERICA, INC.