A mechanic mystery - wheel bearing noise that isn't a wheel bearing, I'm stumped - Page 2 - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
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Old 04-09-2019, 07:03 PM   #11
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LOL, somebody comes along to explain how to get max life out of track tires. Like it's even applicable to street use. And admitting to alignments that wear them out faster.

Tire life and car handling over long periods of time vs. tracking are two different things. If you rotate you HAVE averaged out the wear on all 4 but then the latter half of tire life on all 4 eats you alive due to NONE of them being at optimum. I have driven cars like that and they do NOT handle as well as the other way I describe, because two tires are almost always still new and on the front where most handling comes from at legal street speeds anyway.. FWD physics are such that the front produces most of the handling with the rear simply retracking straight after corners like a trailer. The backs don't have to be at optimum except maybe in snow or ice. Or at speeds high enough to be about to lose it on the rear, and not what I was talking about.

I have driven way too many setups now like I talk about. And used to do the other way too.

I align all my own cars like I used to the drag cars at 150-200 mph. No machine. Don't need one.
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Old 04-10-2019, 03:10 PM   #12
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An update after having the transmission guy look and listen. He says its not a wheel bearing (which I knew) and not the differential bearing (which I didn't). He's chalking the sound up to tires.

I'm still not convinced on that front, since the front tires are different than the rear (and very different wear levels) and the sound doesn't change to my ear when I rotate the front driver tire with the rear one. On the other hand, he claims he thinks the sound is coming from both the front and the rear (I'm not sure I agree). Also, I did put new fronts on about a month ago. The sound did NOT appear right after mounting the new front tires, but not too long after, so maybe not impossible? But, like I said, I don't hear it moving when I move tires.

In any case, damn loud sound if they are tires. Kumho Solus TA11's for the record.
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Old 04-12-2019, 04:45 PM   #13
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Further update for anyone interested.

Did full rotation on the tires, does not change the sound at all. Scratch tires off the list.

Also listened to the sounds from different seats in the car (with someone else driving). Definitely up front, not in the rear. Though, isn't as specifically driver side from other "vantage" points. Just generally front.

Back to a prior poster's comment - I'll be damned if it doesn't in fact seem like when it goes over a pothole, or momentarily release weight, that the sound momentarily pauses, just like you described.

Still stumped.
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Old 04-12-2019, 06:10 PM   #14
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Can you put the car on stands or a lift and have somebody else [carefully] put the car in drive to isolate the noise further?
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Old 04-13-2019, 09:52 PM   #15
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If done make sure the axles are neutral (jack up under the control arm) to be pretty straight or you could easily get false noise due to axle running way out of the normal range, a good way to tear one up too.
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Old 04-21-2019, 06:42 PM   #16
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RESOLVED.

It was the "carrier" bearing that it is integral and mid-shaft in the passenger cv axle. You know, the one that I had replaced 6 months ago because the old one was screaming. The "new" bearing made a different tone of sound on its fail, but swapping out that axle (with the bearing) on a whim this weekend did the trick.

For the record, the one I put in 6 months ago (that failed) was one of the Suntrack brands bought off Rock Auto. This time I went with a new Cardone Select from Rock Auto.
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Old 04-22-2019, 03:24 AM   #17
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You yourself weeded it out earlier, and insisting the noise was driver side. Or that bearing would have been brought up, by me at least.
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Old 04-22-2019, 11:32 AM   #18
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Quote:
Originally Posted by amc49 View Post
You yourself weeded it out earlier, and insisting the noise was driver side. Or that bearing would have been brought up, by me at least.
True enough, though I posted afterwards that after listening from various spots in the car that I thought the sound was more generally front (as opposed to just driver's) but definitely front.

Ultimately, it is frustrating to have a new part fail.
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Old 05-12-2019, 09:04 PM   #19
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Same issue, two different focusí. Turned out to be the alignment. Didnít have major wear to the tires. Might have someone throw it on a rack and check that out. All 3 focus Iíve owned had alignment issues.

Another thing Iíve noticed. On these cars the driver front sound is usually actually coming from the passenger rear of the car. And vice versa on the other side.

Hope this helps.


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Old 05-15-2019, 01:18 AM   #20
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You need a hearing check.

I ran loud hundred foot long printing presses for 35+ years and using no ear plugs through all of it to suffer a great deal of hearing loss and plenty of super loud standing right next to drag car noise as well but I still have no trouble telling what corner of the car noise is coming from. I absolutely 100% disagree with that noise coming from the opposite corner thing in its' entirety.

It can be hard to tell left rear from right rear but take enough care and that becomes clear as well. The rear has the advantage of simply jacking up to freewheel the tires to compare the two sides. Compare both bearing noise as fast as you can spin the tire and look at how out of round the rear tires are as well and you should be able to come up with a 100% solid conclusion there.

I have two Foci and zero alignment issues ever just like with every other car I've ever had but then I don't use alignment machines at all, doing the cars myself.
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