Main Shaft Assembly for Single-Range: Disassembly

NOTE:

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

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.
Flatten the tab of the lock nut.
Remove the lock nut from transmission main shaft assembly for single-range.
ST1 498937000 TRANSMISSION HOLDER

ST2 499987003 SOCKET WRENCH (35)

Fig 1: Removing Lock Nut From Transmission Main Shaft Assembly
Courtesy of SUBARU OF AMERICA, INC.
Remove the 6th drive gear and ball bearing using the ST1, ST2 and a press.
ST1 899864100 REMOVER

ST2 18722AA000 REMOVER

Fig 2: Removing 6Th Drive Gear And Ball Bearing Using ST1, ST2 And Press
Courtesy of SUBARU OF AMERICA, INC.
Remove the needle bearing, 6th baulk ring and 5th-6th coupling sleeve.
Remove the 5th drive gear, 6th needle bearing race, 5th baulk ring, 5th-6th synchronizer hub and needle bearing using the ST1, ST2 and a press.
ST1 899864100 REMOVER

ST2 18722AA000 REMOVER

Fig 3: Removing Needle Bearing, 6Th Baulk Ring And 5Th-6Th Coupling Sleeve
Courtesy of SUBARU OF AMERICA, INC.
Shift the 3rd-4th coupling sleeve into 3rd, then remove the 4th drive gear, taper roller bearing and 5th needle bearing race using the ST1, ST2 and a press.
ST1 899864100 REMOVER

ST2 899714110 REMOVER

Fig 4: Removing 4Th Drive Gear, Taper Roller Bearing And 5Th Needle Bearing Race Using ST1, ST2 And Press
Courtesy of SUBARU OF AMERICA, INC.
Remove the 4th gear thrust washer, 4th baulk ring, needle bearing and 3rd-4th coupling sleeve.
Remove the 3rd drive gear, 4th needle bearing race, 3rd-4th synchronizer hub, inner baulk ring, 3rd synchro cone, outer baulk ring and needle bearing using the ST1, ST2 and a press.
ST1 899864100 REMOVER

ST2 899714110 REMOVER

Fig 5: Removing 4Th Gear Thrust Washer, 4Th Baulk Ring, Needle Bearing And 3Rd-4Th Coupling Sleeve
Courtesy of SUBARU OF AMERICA, INC.