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[qlty]

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[Purplefade]

Almost sounded like as you turned left the scraping stopped?

Just thinking out loud here but possibly a cv shaft and maybe when it was on the lift, tire and suspension hanging, it out enough pressure on the cv knuckle to make it quiet.


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[80stech]

That sound more like it's in time with the front diff than it does the wheel?? Is that oil on the fender well ??

[Clavurion]

Originally Posted by 80stech

That sound more like it's in time with the front diff than it does the wheel?? Is that oil on the fender well ??

Same here. The frequency is definitely higher than wheel rotating and would more likely fit to front propeller / front diff intake side.

[EODguy]

I've had a similar noise and it was the dust shield lost a bolt. It would go away on the turn because the steering can make the tie rod touch it if it's out of place, if so you'll be getting a sheetmetal rattle soon when the other bolts loosen up.

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[Purplefade]

Originally Posted by EODguy

I've had a similar noise and it was the dust shield lost a bolt. It would go away on the turn because the steering can make the tie rod touch it if it's out of place, if so you'll be getting a sheetmetal rattle soon when the other bolts loosen up.

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That’s kind of where I was, sheet metal sounding and on a lift the suspension and steering components sag so you wouldn’t hear it. I’m thinking if it were the diff, lift or no lift, it would still make noise - I know mine did when it failed.


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[Purplefade]

I believe those had a 5 spd GM transmission in them, my guess is he’s talking about the tranny.

Fingers crossed that isn’t your issue - though they do sound similar unfortunately.

If the boots are in good shape I agree probably not the CV, I guess I would start by thoroughly inspecting the heat sheild and then maybe getting the front end in the air and taking a stethoscope to that side driveline all the way to the diff while someone slowly turns that wheel.

May also take it back to your mechanic and see if he can put it back on the lift and using a transmission jack, or something similar, slowly raise that control arm to load that side and see if he can duplicate the sound.


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[80stech]

I can't believe the shop would let that go with saying "it didn't make the noise on the lift!" Maybe time to look for different shop!

[Purplefade]

Really doesn’t sound wheel bearing like and it also doesn’t look like the sound is a one to one rotation with the wheel... it sounds faster based on the video. The fact that it only happens with the weight of the truck on it should tell us something too. You may have to drive that side of the truck up on a ramp (so everything is more compressed) and slide under there and inspect the entire length of the rotating assembly - sounds very much like something is rubbing. As EODGuy said, almost sounds metallic, like sheet metal scraping.

Did your mechanic thoroughly inspect everything for scrape marks? I would think if it is external that something has to have a mark or ten on it.

[c-bass]

I had a similar sound and it was the driveshaft center bearing.

If you are reversing and you hear that sound that's kind of the giveaway of the shaft vs a wheel bearing.

Also if you think about the revolutions of the driveshaft vs the wheels, that's why it sounds "fast" when you're moving slowly.

In my case accelerating or loading the drivetrain made the noise go away for a while and then it changed to different howls and squeaks as I kept driving it