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Old 01-02-2013, 01:01 PM
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Searching for a noise sounds like road noise...

Hello,

I have a 2k PSD 7.3 4x4 with about 300k on it

I have only had it for about 6 months and have not gotten much past filters and some general looking at the suspension so at this point it could be just about anything making this noise.

My story is the other night getting on the highway, empty bed standard evening goin about 55. As i went from the onramp (concrete) to the highway (asphalt) i heard what sounded like the road had been ground getting ready to redo. I went about a mile and thought that it also felt like the truck was dragging excessively and was worried i had picked up something around the axle. It was night and i looked all over and did not see anything, got back on the road and the noise was gone so i thought maybe it fell off when i slowed down.

Well the next day i was on another onramp and when i hit that steel expansion joint again the nose was back, this time i could tell drivers side, but as i turned off the radio and rolled down the windows it went away.

I could get it to come back if i drive over a larger manhole, expansion joint, or even the turtles in the road, but then it goes away as i try to figure it out.

It does change tone with speed so it must be on the wheel somewhere and when i slow it usually goes away, or if i hit another bump it goes away. It also is not always the same, some times it is louder some times softer.

Then new years i was headed home about 3am and it was very persistant, so i took advantage of the empty highway and tried to recreate it then hang out of the truck to listen for it. (glad i didn't just get pulled over) but i am almost positive it is drivers front wheel now, but again looking around under there and pulling on the calipers and shocks nothing appears out of place or able to rub the wheel.

The only info i have seen about this noise on the form was someone suggesting that the bearings were going out in the hub or those needle bearings in the whole wheel which was already on my list of PM. My only thought though was these other people said it was consistant noise, mine is intermittent when i hit a bump. Again this is a new truck, i have only engaged 4wd twice to test and once for about 1 min to get out of some wet grass and it worked, i have not even broken open the lug nuts yet, so it really could be anything.

any suggestions?

Thanks
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Old 01-02-2013, 03:19 PM
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I'm assuming it's a 4WD - right? If so, anytime I hear someone describing what sounds like the "rumble strips" cut into the pavement, I think needles first. They Are intermittent at first and often start with a bump or turn.

There's an Easy test for bad needles. Just lock the hubs IN (you don't need to be in 4WD) so the diff is turning the axles. This eliminates the need for the needles altogether and if the noise doesn't come back That's the bad needle. Unlock one side at a time to find which side is making the noise...
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Old 01-02-2013, 03:56 PM
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That is great, well not great, but helps me out a bunch. They were on my list, and i will test that tonight to see if it confirms what you said. I just hate when there is a noise or problem that you can not find until it fails on the high way, at night, when you are late, and in nice clothes, and your cell phone is dead.
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Old 01-19-2013, 10:50 AM
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Im having the same problem, anyone have a diagram for the needle bearings? just so im clear, take the hub off and on the back inside of the hub assembly there is the needle bearings?
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Old 01-19-2013, 11:07 AM
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When my hubs went out on my 99 it started intermittantly, then constant. Im a noob PS owner so Im not really sure what the needle bearings are... I just simply replaced the hubs. Afetr 4 months my drivers side hub is out again. Autozone is replacing it for me. Im actually about to go pick it up. So it could be the needle bearings causing my truck to "eat" the hubs?
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Old 01-19-2013, 03:36 PM
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Have a look at this -> Welcome to guzzle's 4x4 Needle Bearing Maintenance Web Page
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Old 04-09-2013, 08:38 PM
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So i am reviving my old thread, i hate when people forget to close these out. The bearings were shot in that hub, as life happens, when work picks up it is non stop and i ended up locking in that hub because if i cant hear it then it is not a problem right?

I finally got a chance to begin work on the rig with breaks in the rain and now with the hub being rebuilt i wanted to dive in to the whole front end, finding parts, learning, getting ready... SO what it all came down to was to keep these hubs, and what seemed like another problem waiting to happen, or for about the same $100 in parts i can go for a set of warn locking hubs which will be trouble free and even give me back low range 2wd which i loved in my toyota.

in the front end from my research and parts in my driveway the main bearings are a sealed unit, but thanks to guzzle i got the inner bearings lubed as PM to save the axle stubs, and the 150$ assembly. Then with the hubs i am waiting for the locking hubs, the bearing was about $15 each side to replace, but one hub already had a crack in the paddle and @ 150-200 on e-bay plus the bearings the locking hubs were the logical solution. I did however still replace all of the seals from Diesel O rings just incase i need to put the auto hubs back on, and they also are there to keep the bearings clean not just the vacuum pressure.

Thanks guys for your help on confirming the problem, in the end it was much easier to find the solution with your help than i thought it would be.
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