What do you actually check on a pre-trip inspection?

Need to check inside the axle.

That means sticking your head down in there. Or looking from the other side.

 

you should be able to look at that cap and see oil inside the hub, that's how you check the level.

 

That particular hub looks grease packed. I don't see the oil level if it has oil in it? I had those exact same hubs on a trailer but they were factory grease packed.

 

That clear ish plastic in the middle is or would be your sight glass. I'm also now thinking those are grease packed hubs. if they were oil you should be able to see the oil and I think it would have a oil level indicator on it

 

Yeah I saw that. I saw the same thing lester did. There's no visible oil level and those opaque sight windows don't have the "low", "full" marks that are normally on the clear (not opaque like yours in the pic) sight glasses of typical oil bath hub caps. You can have either oil bath or grease packed behind those type hubcaps but that one just appears to be grease packed imo.

 

It's grease filled .. why do you have to make a huge production over the simplest things ..For somebody thats been in a truck as long as you say you have .. you would think that would be pretty easy to figure out .. but being the drama queen you are you have to drag it out for 20 pages