The sealing rings are synthetic resin with chamfered ends. Check the condition of the sealing rings, and replace them only if they are worn, distorted, or damaged.
For a better fit, squeeze sealing rings together slightly before installing them.

Apply ATF to the new sealing rings, then install them on the secondary shaft.

After installing the sealing rings, verify the following:
The rings are fully seated in the groove.
The rings are not twisted.
The chamfered ends of the rings are properly joined.
Visual Index
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Start-up
The navigation system starts automatically when you turn the ignition to
ACCESSORY (I) or ON (II). At start-up, the following Confirmation screen is
displayed.
1. Select Change Language.
► ...
Clutch Disc Inspection and Removal
Remove the clutch disc (A), the remover handle (B), and the clutch
alignment shaft (C).
Inspect the lining of the clutch disc for signs of slipping or oil. If
the clutch di ...