[SOLVED] Pesky Squeak

I have been chasing what I thought was a brake squeak on my 2020 Tahoe. But I have eliminated anything directly connected to the brakes. And last nite I replaced the bearing/hub (passenger front). It had a slight grindy-ness to it. And there was grease caked on the back side of the hub. Figured that had to be it. Seal failed, bearing is going dry... Squeaks.

I was wrong. Squeak is still there. So now I'm thinking it's the CV shaft... Thoughts? The noise is very reminiscent of a low brake pad squeaker, but maybe a little softer. I was thinking about trying to inject some grease into the boot, using a syringe or etc. Has anyone tried that? Is there a good method to reseal the hole made by the syringe?

Any other ideas on where the squeak is coming from? The squeak varies with speed, and is present whether the brakes are on or off.

I recommend that you take the truck to a trusted local repair shop, and get the truck on a lift with the wheels off the ground and with someone inside the truck. Put the truck in gear and press the gas pedal a bit, and see if the noise also occurs in the unloaded situation (wheels off the ground). If the noise still occurs, then the Mechanic underneath the truck can go around, with a stethoscope if necessary, and locate the source of the noise.

Regarding CV repair, if that is determined to be the source of the squeak, then replace it, rather than trying to inject grease into the boot.

How do you put a stethoscope on a rotating cv axle?

Man, I want to say verrrrrry carefully, but I won't.

Fless said:

Man, I want to say verrrrrry carefully, but I won't.

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I would have, but now you've lost your chance.

Joseph Garcia said:

I recommend that you take the truck to a trusted local repair shop, and get the truck on a lift with the wheels off the ground and with someone inside the truck. Put the truck in gear and press the gas pedal a bit, and see if the noise also occurs in the unloaded situation (wheels off the ground). If the noise still occurs, then the Mechanic underneath the truck can go around, with a stethoscope if necessary, and locate the source of the noise.

Regarding CV repair, if that is determined to be the source of the squeak, then replace it, rather than trying to inject grease into the boot.

Click to expand...

I completely get your sentiment here, but... If the CV joint is the squeaker, I would be adding grease to confirm that it is the problem, then replace it. In the event that it isn't the problem, I want to re-seal the boot.

I read somewhere that you can replace the CV axle with out taking the brakes and bearing hub apart. Is that correct?

Also, are both sides the same?

Update - Swaybar link and shock had to come out, and both sides are the same.

Any chance of a piece of grit or sand got in a brake pad? I've actually had that happen and make a squeak, not real loud but aggravating.

tom3 said:

Any chance of a piece of grit or sand got in a brake pad? I've actually had that happen and make a squeak, not real loud but aggravating.

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I suppose its possible, but I didn't see anything like a gouge or etc. on the rotor.

Well, the squeak is no more. Changing the CV axle fixed it. The outboard joint on the old axle was kinda sloppy when it was out of the truck. I might take the boot off and inspect further, but it's gonna be so messy... I'll post a pic or two of what ever I find, if I decide to do that.