2002 Tahoe..Help with rotational whirring.

[raptorred]

It's speed-dependent; maybe a driveshaft u-joint? Looks like it has 4wd so there are front and rear propshafts, 4 u-joints total.

If you can drive on wet or gravel roads, does having it in 4HI make any difference in the noise?

Oh that is something I did forget to mention, 4LOW does not work. 4HI does work. The sound is there regardless of whether or not its in 4HI or not.
Also I did check the Ujoints myself, they were good.

 

[Doubeleive]

bottom line Autumn is your going to have to someone look at it, we can internet it to death but it needs a hands on to verify, maybe try a different mechanic for a 2nd opinion on the transfer case or possible cause. I would have them check the u-joints & pinion bearing aside from the transfer case.

 

[Doubeleive]

Oh that is something I did forget to mention, 4LOW does not work. 4HI does work. The sound is there regardless of whether or not its in 4HI or not.
Also I did check the Ujoints myself, they were good.

4hi/lo should be in working order if you had the front diff replaced unless the switch or actuator is bad.

 

[raptorred]

that's what makes me suspect the pinion bearing, u-joints could be worn but I have never heard them make noise like that.

So the pinion bearing in the rear diff?

 

[Doubeleive]

So the pinion bearing in the rear diff?

ya I have had them make the exact same noise, I wore mine out 2-3 times on my 300k+ journey with my 00

 

[raptorred]

bottom line Autumn is your going to have to someone look at it, we can internet it to death but it needs a hands on to verify, maybe try a different mechanic for a 2nd opinion on the transfer case or possible cause. I would have them check the u-joints & pinion bearing aside from the transfer case.

Ok, I appreciate the help.
I understand listening to a noise on a video is much different than hearing/seeing it in person.

 

[Doubeleive]

Ok, I appreciate the help.
I understand listening to a noise on a video is much different than hearing/seeing it in person.

very true and another thing is with these trucks sounds can be coming from one place and sound like they are coming from someplace totally different, I don't know how many times it sounded like something in the rear and it was in the front or vica-versa.

 

[Doubeleive]

I even got under it one time and would swear on my life it was coming the transmission and it turned out to be the rear end

 

[OR VietVet]

Like Wes says, noise travels thru metal and can be tricky to pinpoint at times. Plus, with the cavernous space inside these rigs that can change noise deflection and can make you think the noise is one place when in fact it is in another place. Autumn, I am also going to recommend this:


We recommend that you put all your rig(s) info in your signature so we all don’t have to guess at year, make, model, engine size, trans, rear axle locker…….etc. While you may have posted pertinent info in your first post, you may forget to do it again and the info is needed by us anyway. Makes it way easier on all members that attempt to help, to have that info right up front. It is also recommended that you take a pic of your RPO codes, on the inside cover of the glove box, and post that image in your signature. All this info will greatly help those that will try to help with a problem.


If there is any other info, like upgrades, mods or recent mechanical/maintenance work done, that would be helpful in any post as well. Too many times a question is asked by the poster and after about 10 responses we find out that the poster has done recent work to attempt to fix the problem or work that was done that SEEMS not related to the problem.


This helps all of us help you and it also takes away the problem of not giving pertinent info about the rig in each post.

 

[raptorred]

Like Wes says, noise travels thru metal and can be tricky to pinpoint at times. Plus, with the cavernous space inside these rigs that can change noise deflection and can make you think the noise is one place when in fact it is in another place. Autumn, I am also going to recommend this:


We recommend that you put all your rig(s) info in your signature so we all don’t have to guess at year, make, model, engine size, trans, rear axle locker…….etc. While you may have posted pertinent info in your first post, you may forget to do it again and the info is needed by us anyway. Makes it way easier on all members that attempt to help, to have that info right up front. It is also recommended that you take a pic of your RPO codes, on the inside cover of the glove box, and post that image in your signature. All this info will greatly help those that will try to help with a problem.


If there is any other info, like upgrades, mods or recent mechanical/maintenance work done, that would be helpful in any post as well. Too many times a question is asked by the poster and after about 10 responses we find out that the poster has done recent work to attempt to fix the problem or work that was done that SEEMS not related to the problem.


This helps all of us help you and it also takes away the problem of not giving pertinent info about the rig in each post.

Thank you, I think I upgraded my signature correctly.