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Old 04-01-2014, 07:08 PM   #1
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Default Car prob question. (Vid included)

I've seen a few other car issues posted here in chit chat. So why not. Need some insight on this ugly noise. Is is NOT the brakes. It is not the suspension either. It only does this in reverse or while in gear in town and I let off the gas. Soon as I press the clutch it'll silence. Acceleration, takeoff, and staying the same speed has no sign of this noise. I have the same question posted in a miata forum but doesn't seem to be getting replies.
http://youtu.be/iseGM_WlQxI
I still have yet to get under and inspect the drivetrain but if it's not raining tommorow I will.
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Old 04-01-2014, 07:14 PM   #2
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Default Re: Car prob question. (Vid included)

Unless it's brakes making funny noises while in reverse, I have no clue, little thing sounded pretty good under throttle otherwise though
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Old 04-01-2014, 07:44 PM   #3
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Default Re: Car prob question. (Vid included)

e-brake?
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Old 04-01-2014, 07:45 PM   #4
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Default Re: Car prob question. (Vid included)

what kind of car is it? I honestly couldn't tell from the vid. Reason for asking: it would help to know if it's front wheel drive or rear wheel drive.
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Old 04-01-2014, 07:51 PM   #5
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Default Re: Car prob question. (Vid included)

Quote:
Originally Posted by BigSki View Post
what kind of car is it? I honestly couldn't tell from the vid. Reason for asking: it would help to know if it's front wheel drive or rear wheel drive.
It's a Mazda Miata, a little front engine/rear drive British roadster made by the Japanese........after it was designed and engineered in California
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Old 04-01-2014, 07:52 PM   #6
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Not the ebrake. And it's a '90 mazda miata. Got it less than a week ago. I'm just trying to go through all the small issues the past owner ignored and/or shortcutted. Trust me they did. I pulled the shifter today and replaced the fluid in it. Found quite a few things.
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Old 04-01-2014, 07:55 PM   #7
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Default Re: Car prob question. (Vid included)

When I listened to the vid, the noise sounded like it would be in time with a drive-shaft rotating, that's why I wanted to be sure the car would have a drive-shaft.

I'd look at the u-joints.

Last edited by BigSki; 04-02-2014 at 02:29 PM.
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Old 04-01-2014, 08:04 PM   #8
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Default Car prob question. (Vid included)

Thanks bigski. Oldman52 pmed me right after I posted this saying ujoint was pretty likely and why. Could be pretty likely there's a grease cert and the bearings just dry as there's no shimmy or anything yet. If there's no rain tomorrow I'll be getting under the car to look at it. Thanks y'all. So much better than the mazda forum and all within 30 minutes.
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Old 04-01-2014, 08:11 PM   #9
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Default Re: Car prob question. (Vid included)

Check the mounts for the differential and motor/trans. Sounds like something is moving under torque and causing something to rub.
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Old 04-01-2014, 08:13 PM   #10
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Default Re: Car prob question. (Vid included)

loose wheel bearings allowing the rotors to rub on the rotor shields
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Old 04-01-2014, 08:15 PM   #11
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Default Re: Car prob question. (Vid included)

Geeze Mike, kinda sounds a little (fortunetly for you very little) like my friend's Fox Body, calling it a Clusterfawkstang would be more accurate than a Mustang considering what they have or still need to fix on it!
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Old 04-01-2014, 08:17 PM   #12
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It's only when in gear. For ex in reverse and engaged. If it's rolling backwards in reverse the moment I push the clutch it stops the noise. So negative torque feedback is causing the squeaking. I'm convinced it's a ujoint now I have a couple of you guys navigating straight to it.
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Old 04-01-2014, 08:20 PM   #13
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Default Re: Car prob question. (Vid included)

Quote:
Originally Posted by CrawlinMike View Post
It's only when in gear. For ex in reverse and engaged. If it's rolling backwards in reverse the moment I push the clutch it stops the noise. So negative torque feedback is causing the squeaking. I'm convinced it's a ujoint now I have a couple of you guys navigating straight to it.
Still might not hurt to look for anything loose at the diff too, it could still be rolled back when rolling backwards causing something to rub.
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Old 04-01-2014, 08:21 PM   #14
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Oh I definetly will. I have the fluid to change out the man trans fluid and diff fluid as well as a little pump to put it in. So I'll be down there for a bit.
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Old 04-01-2014, 10:39 PM   #15
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Quote:
Originally Posted by BJoe View Post
little thing sounded pretty good under throttle otherwise though

Thanks. It's got a header into a solid welded straight pipe all the way back to the fart can lol. Sounds cool to me in town but the highway the drone can get annoying. I've had a lot of guys try to get me to drag race them at lights. Nahh. I know what it can do. No reason to run the crud outta the car for nothing at every light.
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Old 04-01-2014, 10:41 PM   #16
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Default Re: Car prob question. (Vid included)

worn out bearings in the gearbox
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Old 04-01-2014, 10:49 PM   #17
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Quote:
Originally Posted by csb510 View Post
worn out bearings in the gearbox

Oh I hope not
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Old 04-02-2014, 04:18 AM   #18
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Default Re: Car prob question. (Vid included)

Quote:
Originally Posted by BJoe View Post
little thing sounded pretty good under throttle otherwise though
i wanted to say the same thing!!!! Sounds pretty good im sure youve heard it enough but yea check the joints,my dads silverado did the same thing,he would drench the joints in wd40 and the squeek would go away
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Old 04-02-2014, 05:45 AM   #19
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Default Re: Car prob question. (Vid included)

If the noise stops when you press the clutch.Check the throwout bearing.
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Old 04-02-2014, 03:06 PM   #20
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Default Re: Car prob question. (Vid included)

While you are checking the throwout bearing also check the dust shield covering the flywheel/torque convertor. It sounds like the dust cover might be loose or rubbing on something.
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