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.
Changing Your Route
DEST button (when en route)
This section describes how to alter your route, add an interim “waypoint”
(pit stop),
choose a different destination, cancel your current destination, and continue ...
Rear Axle Beam Replacement
Raise and support the vehicle.
Remove the rear wheels.
Remove the rear hub bearing unit.
Remove the parking brake cable bracket (left side) (A), the b ...
Transmission Fluid
Automatic Transmission Fluid
Specified fluid: Honda ATF DW-1 (automatic transmission fluid)
Check the fluid level when the engine is at normal operating temperature.
1. Park on level ground, and ...