Main Shaft Assembly: Disassembly

WARNING: This page is about a different variant/trim than selected.

NOTE: Individual coupling sleeves and synchronizer hubs meet at a specified position. Before disassembly, mark the meeting position of the coupling sleeve and synchronizer hub.

Affix the ST to the work table.
ST 18664AA000 BASE
Flatten the tab of the lock nut.
Set the main shaft assembly to the ST, and remove the lock nut and lock washer.
ST1 18665AA000 HOLDER

ST2 18664AA000 BASE

NOTE: Use a 38 mm socket wrench.

Fig 1: Removing Lock Nut And Lock Washer
Courtesy of SUBARU OF AMERICA, INC.
Remove the main shaft assembly from the ST.
Set the ST1 to the 6th drive gear, and use a press to remove the double taper roller bearing and outer race, 6th drive gear bushing and 6th drive gear.
ST1 18722AA010 REMOVER

ST2 899864100 REMOVER

Fig 2: Removing Main Shaft Assembly From ST
Courtesy of SUBARU OF AMERICA, INC.
Remove the 5th-6th coupling sleeve, needle bearing and 6th baulk ring.

Fig 3: Installing 5th-6th Coupling Sleeve, Needle Bearing And 6th Baulk Ring
Courtesy of SUBARU OF AMERICA, INC.
Set the ST to the 3rd drive gear, and use a press to remove individual parts.
ST 18720AA000 REMOVER

Fig 4: Setting ST To 3rd Drive Gear
Courtesy of SUBARU OF AMERICA, INC.