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  #11  
Old 09-29-2018, 06:58 AM
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Originally Posted by andrewwynn View Post
Take a video of your wheel hanging your arm out your window and verify if in fact the sound happens once per revolution of the wheel that will make a huge difference in solving the problem.

It is not uncommon for that dust cover to get bent in a way that it would contact the rotor and if the rotor has a lump of rust on it it might be hitting that once per revolution.


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I drove it after work yesterday and it doesn't always go with rotation of the wheel. It seems like it does sometimes but then it goes silent and comes back at different speed than the wheel rotation.

I'm really hoping it's the bolts on the plate, especially since 4 of them connect to the sway bar that might be the issue too.

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  #12  
Old 09-29-2018, 10:30 PM
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It could be as simple as one of the bolts had a crumb of rust in the nut and felt tight by torque but wasn't tight axially.

The sound of the sway bar lifting and tapping into the subframe sounded very much like your video.


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  #13  
Old 10-01-2018, 12:03 PM
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Ok I got it lifted now and took the wheels off to check if anything was rubbing in the brakes. I recorded this video with something similar to the sound when driving.

The bolts on the stiffening plate are pretty tight not sure if I should even take them off since maybe they are good?

When your plate made sound was the plate and bolts visibly loose and able to move by hand or did it seem tight still?

https://photos.app.goo.gl/ZfyU2CZXGs975bRm7

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  #14  
Old 10-01-2018, 12:04 PM
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Originally Posted by Draztik View Post
Ok I got it lifted now and took the wheels off to check if anything was rubbing in the brakes. I recorded this video with something similar to the sound when driving.

The bolts on the stiffening plate are pretty tight not sure if I should even take them off since maybe they are good?

When your plate made sound was the plate and bolts visibly loose and able to move by hand or did it seem tight still?

https://photos.app.goo.gl/ZfyU2CZXGs975bRm7

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Quote:
Originally Posted by andrewwynn View Post
It could be as simple as one of the bolts had a crumb of rust in the nut and felt tight by torque but wasn't tight axially.

The sound of the sway bar lifting and tapping into the subframe sounded very much like your video.


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Ok I got it lifted now and took the wheels off to check if anything was rubbing in the brakes. I recorded this video with something similar to the sound when driving.

The bolts on the stiffening plate are pretty tight not sure if I should even take them off since maybe they are good?

When your plate made sound was the plate and bolts visibly loose and able to move by hand or did it seem tight still?

Here is the link to the video
https://photos.app.goo.gl/ZfyU2CZXGs975bRm7

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Sorry double post
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Last edited by Draztik; 10-01-2018 at 12:04 PM. Reason: Double post sorry
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  #15  
Old 10-01-2018, 02:31 PM
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Drive train slack usually will only make noise when changing direction. Unless there is a secondary issue like loose subframe bushing that will allow the drive train to go slack under power.

Some testing like driving up hill and down hill could help determine. If the drive train slack is the source of the sound.
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  #16  
Old 10-01-2018, 03:41 PM
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Originally Posted by andrewwynn View Post
Drive train slack usually will only make noise when changing direction. Unless there is a secondary issue like loose subframe bushing that will allow the drive train to go slack under power.

Some testing like driving up hill and down hill could help determine. If the drive train slack is the source of the sound.
Ok so should I just try and see if the sound comes or is gone depending on angle?

The shaft definitely makes the metal on metal sound when I turn it back and forth by hand.

The sound is not where the disc is at but at the center of the vehicle.

Could this all happen due to the front axles being replaced?

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Old 10-01-2018, 04:16 PM
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General comment on the noise frequency / synch with wheel rotation - I think it makes sense for something to be synched with wheel rotation (or some other rotating thing like a driveshaft, pulley, fan, gear), or NOT. Synched or not synched. Not both.

I can't think of any single issue that would sometimes be synched with wheel rotation and then sometimes still be present but not synched. Sure I can believe it goes away completely intermittently. But to switch into an un-synched mode would be pretty weird. Maybe it's still synched but missing beats for some reason?

So I'd put more diagnosis testing into resolving that. Synched vs. not will do a lot to narrow down what the problem could be.
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  #18  
Old 10-01-2018, 06:24 PM
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Originally Posted by oldskewel View Post
General comment on the noise frequency / synch with wheel rotation - I think it makes sense for something to be synched with wheel rotation (or some other rotating thing like a driveshaft, pulley, fan, gear), or NOT. Synched or not synched. Not both.

I can't think of any single issue that would sometimes be synched with wheel rotation and then sometimes still be present but not synched. Sure I can believe it goes away completely intermittently. But to switch into an un-synched mode would be pretty weird. Maybe it's still synched but missing beats for some reason?

So I'd put more diagnosis testing into resolving that. Synched vs. not will do a lot to narrow down what the problem could be.
Up and down a hill the sound was the same, turned around and went up and down the same hill but no sounds.

I got underneath and had someone turn the rotor back and forth a little and it sounded like it was coming from the center of the car at the end if the shaft.

Here's a newer clip from today.

https://drive.google.com/file/d/1cuu...w?usp=drivesdk

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  #19  
Old 10-02-2018, 04:51 PM
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I did another test drive and the noise is non-existent in neutral. I'm pretty confident it's coming from the drive shaft.

Just as a test I sprayed some lubricant where the flex disc is, the drive shaft and transfer case meet (both front and rear) and the U joint of the rear.

It is still there but a little less frequent.

Anyone think I might need to replace the front shaft?

Kinda worried now about low fluid in the front differential but the sound is coming more from the spline area it seems at the transfer case.

Thank you everyone for advice, this is the beauty of forum help.

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Last edited by Draztik; 10-02-2018 at 05:03 PM.
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  #20  
Old 10-06-2018, 11:39 PM
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Originally Posted by andrewwynn View Post
Drive train slack usually will only make noise when changing direction. Unless there is a secondary issue like loose subframe bushing that will allow the drive train to go slack under power.

Some testing like driving up hill and down hill could help determine. If the drive train slack is the source of the sound.
The front drive shaft has been taken care of by my great mechanic.

Car seemed fine then the noise came back but sounds like it's from the rear. Turn right 9/10 times no sound. Turn left and there is sound, drive straight it's gone especially at 30 mph or more.

Still real strange, any ideas on what to check?

https://drive.google.com/file/d/1gJu...w?usp=drivesdk

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