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.
Precautions While Driving
NOTICE
Do not operate the shift lever while pressing the
accelerator pedal. You could damage the
transmission.
If the ignition switch is turned to ACCESSORY
or
LOCK while driving, the engine ...
Transmission Side - Release Bearing Inspection
Check the play of the release bearing by spinning it by hand. If there is
excessive play or noise, replace the release bearing.
NOTE: The release bearing is packed with grease. Do not ...