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Old 01-09-2012, 09:51 AM   #1
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Default rear clunking on deceleration

Driving to work this morning in gridlock traffic my car suddenly started making a loud clunking sound at a constant speed or on decel. On accel there is no sound and no sign of an issue. From what I can tell everything appears fine (still sitting at the gas station waiting for a tow). This started when slowing from 15mph, I doubt I went over 25% throttle on the drive, although it did have a tough weekend of some spirited driving and autocross. Anybody want to play the "guess whats broke" game?
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Old 01-09-2012, 09:57 AM   #2
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Thought I'd add... the sound is speed dependant (quicker with more speed) and occurs in all gears, neutral, and reverse.
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Old 01-09-2012, 09:59 AM   #3
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calling on shuiends...
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Old 01-09-2012, 11:13 AM   #4
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driveshaft bolts? diff mounts? exhaust hitting something? turbo hit block?
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Old 01-09-2012, 12:05 PM   #5
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I had this same thing, and it went away. I though my diff was done, but it looked good. Still have no idea what it was.
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Old 01-09-2012, 12:34 PM   #6
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So I tightened the lug nuts on the driver's rear and it seems to have resolved the issue... I'm retarded... Carry on.
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Old 01-09-2012, 12:36 PM   #7
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Old 01-09-2012, 12:39 PM   #8
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^ , needed a good laugh in the morning, thanks!
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Old 01-09-2012, 01:22 PM   #9
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How loose were they? You may have dodged a hell of a bullet on that one.
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Old 01-09-2012, 02:04 PM   #10
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I jacked it up wiggled the wheel and it felt like a bad wheel bearing. I took the wheel off, spun the hub, wiggled it, everything seemed fine. I put the wheel back on, and it felt normal. Drove around, everything was fine.

I used an impact gun to take the wheel off, so I'm not even sure they were loose, but that seems to be the only explanation.

I just had the wheels powdercoated and the coating is coming off the wheel where it mounts to the hub. I keep wanting to blame the issue on that but it seems like a stretch. At any rate, I certainly lucked out. I can't imagine a wheel falling off would be an enjoyable experience.
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Old 01-09-2012, 04:10 PM   #11
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I know from experience, it is not a fun time.
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Old 01-09-2012, 06:21 PM   #12
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Glad it was simple, but you might want to compare the lug 'holes' with another wheel to be sure they are not wallowed out.
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Old 01-09-2012, 09:28 PM   #13
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I'm ashamed to say this, but that's happened to me before as well. I caught it before the wheel fell off, thank god.
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