Granted I have a D30 and its different than a ranger the unit bearing setup is very similar to the 01+ IFS ranger.

With my tires being so loud and sometimes shaking the truck how would i be able to hear the hum from a hub going bad?

Basically I wanting to know how I can check them to make sure they are good?

I jack the truck up and pull and push the wheel everything is tight! Not sure if that is a valid way to check them though.

The axle had about 80k miles on it when I got it and now probably 100k miles. I have yet to replace the hubs. I am going on a trip in a few weeks, about 1000 miles each way, I want to know if there is another way to check them.

 

pull the hubs off and look at them.....

 

what am i looking for? when i did the balljoints in the fall they looked fine.

 

shrapnel (sp) or other pieces of debris........

 

on a unit bearing? those suckers are sealed up, better not see anything like that

 

i might have you mistaken for another bearing......can you post a picture of it or one like it?

 

i think that if basically everything is tight and when the truck is jacked up and u can spin the wheel freely with no odd noises, you should be fine