You don't - you replace it.
remove engine or transmission to get to rear oil seal . you have to remove fly wheel to r/r rear seal .pretty heavy dutyjob.
How do you fix a rear wheel bearing for a Lexus ls400
how do i replace a wheel seal
replacing rear wheel bearings on frontera B
Brake wheel cylinder or axle sealBrake wheel cylinder or axle seal
Remove the rear tire and wheel. Remove the axle end cap. Remove the rear wheel seal. Remove the rear wheel bearing. Reverse the process to install the new wheel bearing.
First, the car will need to be raised. Then the rear wheel should be removed. Now the existing bearing and seal can be removed and the new ones fitted.
Your rear wheel may be squeaky due to lack of lubrication, worn out bearings, or misalignment. To fix it, you can try lubricating the wheel bearings, adjusting the alignment, or replacing the bearings if necessary.
First, the car will need to be raised. Then the rear wheel should be removed. Now the existing bearing and seal can be removed and the new ones fitted.
bad
Begin by removing the rear tire and wheel. Remove the end of the axle. Remove the wheel bearing nut. Remove the wheel bearing seal and the wheel bearing.
replace it with a new one