Place a spacing washer of the correct thickness and the input-side thrust washer on selector drum (6) and secure with a small amount of grease.
Swing locking lever (8) toward the input shaft and install the selector drum.
Swing locking lever (8) towards selector drum (6), pull back guide plate (7) and engage it in the selector drum.
Place shift forks (5, 10) in the guide tracks.
Install selector shafts (3).
Install torsion spring (9).
Install locking pin (11).
Place thrust washer (4) on the selector drum.