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.
Shaft Assembly and Housing Installation (A/T)
Install the differential assembly in the torque converter housing.
Install the baffle plate.
Assemble the mainshaft, the countershaft, and the secondary shaft.
NO ...
Opening the Hood
1. Park the vehicle on a level surface, and set
the parking brake.
2. Pull the hood release handle under the
lower left corner of the dashboard.
► The hood will pop up slightly.
3. Push ...
Command Help
For “Command Help” menu items, all voice
commands that are available for that
system are listed.
Select Read to hear the commands in the
list read aloud.
Voice Commands ...