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.
Fuel Pump/Fuel Gauge Sending Unit Replacement
Remove the fuel tank unit.
Remove the fuel level sensor (fuel sending unit) (A) from the fuel tank
unit (B).
Check these items before installing the fuel tank ...
Rear Brake Shoe Replacement
caution
Frequent inhalation of brake pad dust, regardless of material composition,
could be hazardous to your health.
Avoid breathing dust particles.
...
Front Stabilizer Bar Replacement
Removal
Remove the front subframe.
Remove the steering gearbox from the front subframe.
Remove the flange bolts (A) and the bushing holders (B), then remove the
...