Duramax Diesels Forum Truck of the Week
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Old 05-16-2018, 07:16 AM
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DAVe3283 DAVe3283 is offline
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Default CV Boot Squeak

My Suburban recently developed a squeak in the front end that matches vehicle speed. Jacked it up, and it was coming from the passenger CV boot. I put some silicon spray on the boot, but that made it much worse. Cleaned that off and sprayed it with WD-40, and it was silent! For 2 days.

The boot looks to be in perfect condition, no cracks or tears, still flexible, etc. But if I don't hose it down in WD-40 every couple days, it makes a horrible cyclical squeak noise "eeeeek-eeek-eek", loud enough it drowns out the LB7 as I pull away from a stop. Super annoying inside the vehicle, I can't imagine how painful that must be for pedestrians.

Has anyone else had this happen? Are there any solutions besides replacing the CV (which is in otherwise perfect shape)? Spraying it with WD-40 every other day is not a viable option, as it flings off and makes a mess while I drive.
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Old 05-16-2018, 09:28 AM
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flatten out your CV angles
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Old 05-16-2018, 10:12 AM
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Try wiping some 90w on it, it’ll stick better and might soften it up a little.
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Old 05-16-2018, 10:54 PM
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Have you checked to see if the boot and band clamp are still in its proper place? Unless your cv angles are extreme I don't see how they could be rubbing while driving straight.

You can always cut the band and pill the boot out a little further up the shaft and reclamp it so the ribs aren't rubbing
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Old 05-17-2018, 06:13 AM
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Rise height is stock, as far as I can tell. When I checked the boots, it was at full droop from being in the air, but it does rub while driving. I can see the area where it touches. Never thought about the boot being in the wrong spot, that's a great suggestion!

I'll measure the boot positions vs. my truck to verify. Especially since it is just the one CV squeaking, I think you're on to something. I wonder how it could have moved to begin with?

I'll try and track down a new clamp (or similar) and move the boot, if that's the issue. Also try some 90W oil, because why not.

Edit: add ride height photo

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Last edited by DAVe3283; 05-17-2018 at 06:47 AM.
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