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.
A/T Countershaft Reverse Selector Hub Installation (A/T)
Special Tools Required
Driver Handle, 40 mm I.D. 07746-0030100
Install 1st gear, 2nd gear, 3rd gear, the 33.2 x 40 x 26 mm
collar, the 29 mm cotters, and the 33 x ...
Airbag and Tensioner Disposal
Special Tools Required
Deployment Tool 07AAZ-000A100
Before scrapping any airbags, side airbags, side curtain airbags, seat belt
tensioners (including those in a whole vehicle to be scrapped) ...
If the Low Tire Pressure Indicator Comes On
U.S. models
■ Reasons for the indicator to come on
A tire pressure is significantly low. If the compact spare tire* is installed,
the indicator stays on for a while, and then goes off.
& ...