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.
M/T Differential Thrust Clearance Adjustment (M/T)
Special Tools Required
Driver Handle, 40 mm I.D. 07746-0030100
Remove the left driveshaft side oil seal from the transmission housing.
If you remove the 80 mm shim (A) from ...
Rerouting
INFO button
► Setup ►Other
►Routing & Guidance
Set whether route recalculation occurs automatically or manually during route
guidance.
Select an option.
The following op ...
Clock Adjustment
INFO button
► Setup ►Other
►Clock Adjustment►Clock Adjustment
Set the automatic adjustment of the system clock for daylight saving and
international time zones.
Select ...