Replacing hub oil

The bad part is most of your oil rides between the bearings.

 

You’ll probably have the most messy oily liquified doo doo of your life. You’ll end up using 2 whole rolls.

 

Some newer aluminum drive axle hubs have a drain plug in the side of the hub. Pull the plug and rotate the hole to the bottom to drain while warm. Then rotate back to the top to fill. 1 quart per wheel end and excess will go to the diff.

Anything else should be tore down IMO If the oil looks bad, I surely would wanna do a bearing inspection anyhow. The only way to get out all the nasty is to wash everything and new seal and oil.