i've had the outer bearing replaced on my drivers side two times in a year and the humming sound still will not go away, what could be the problem.
should i just start from scrath and buy a whole new setup?

 

u joint? hub? them beefy friken tires your running lol

 

Sounds like it is not being installed properly.

A lot of times when mechanics put in bearings, they just air ratchet them in, which is not good.

 

is it an easy job/what do i need for tools-after the first time it was done i still heard the humming so i went to jack it up and the tire had some play, what should i do?

 

Well, the best thing to do would to go get you your 4 wheel drive socket.

You'll need some screw drivers, and the socket, alan wrenches, and a pair of c-clip pliars.

You pull the hub off, then pop out the outer ring with the screw driver. its on the hub, its a steel spring that pops in there to keep the hub in place. Then the c-clip pliars for the center shaft c-clip. Then use 2 of the socket headed cap screws you took out to pull the locker out, just screw them in and pull.

Behind that are 2 lock nuts, those are the important parts! I'm guessing they sheered off the keyway like they did mine.
Pull the first one off, then pull the keeper ring out after that, thats the hard one to get out, then use the socket and pull the inner ring out. Check the inner lock nut for a keyway to be sticking up from it. If it is not, you'll have to use a punch and punch it out so it fits the keyway in the middle ring. That is important with the keeper system.

Now the outer bearing can come off. pull that out and set it aside.
Then pull the hub assembly off the wheel, you can do that without pulling the outer bearing out, but there is more wiggle room for you to pull it off.
HOpefully its not welded on. If its hard, just keep tugging on it, and the seal will pop loose in the back and leave the bearing on the spindle, that is if its welded on now.

What you are going to check for when you have your new bearings is if there is play in the spindle to the bearing race.
Just slide the bearing into the place it goes. It should be fairly snug and not super easy to put on. The play there can mean you have a bad spindle.

So, for parts, you'll need inner and outer bearings, and a new hub seal. I rarely reuse mine, unless i just put it on. Use a rubber mallet to put it on so you dont damage the seal.

Have a copper rod or a brass rod to punch the bearing cups out of the hub assembly. use a small hammer and work your way around the bearing cup till it pops out.
Clean it out really good. If it pops out to easily, or there is free play in the bearing cup on the hub, that means it has spun out and you need to replace the hub.

Just work em back in the same way you did to take them out till they are fully seated on the lip in the hub. you'll hear a different sound from the rod and the hammer when its fully seated.

Now you put the inner bearing in, after you've greased it of course, i hope you know how to do that, and then put the seal into the hub. Slide the assembly onto the spindle, and insert the outer bearing.

Then goes your inside locking nut.
do not use an impact wrench! Do it by hand.
Tighten that bugger down good to help seat the bearings in all the way, try and spin it, if you can't, no big deal.

Now this is the part that people do differently. ONce you've tightend it down all the way, back it off, and snug it up. thats what I do.
Some people in here will say Tighten it down all the way, and back it off a 1/4 or a 1/2 turn.
Then goes your middle lock ring, and make sure it lines up with the keyway on the inner ring. that is important. adjust the inner ring if necessary.
Then put on the outer ring and tighten that baby down.
The outer ring will push the inner ring tighter, this is why it is important not to over tighten the inner ring, cause your going to take all the slop out of the inner one when you push it to the bearing.

Then reassemble the rest.