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Old 09-16-2011, 08:32 AM   #1
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Whump-Whump-Whump-WTF!??

Car is an '86 SPG.

On passenger front, getting a really bad "whump-whump-whump", RPM Dependent (noise quickens as speed increases), and the only sound I could really compare it to would be: "tire rubbing every wheel revolution on a mudflap, or something..."

Anyway - Im thinking wheel bearing. ??? Though, I havent replaced any in a Saab, I've never heard a wheel bearing make this noise. Could it be a bad CV? Havent heard a bad CV sound like this either. Not getting any 'clicking' on full extension on either side.

Someone mentioned Jack Straw had a good "Wheel Bearing DIY" thread - but I cant find it through the search.... Anyone know where I can see it?

Thanks for any, and all help.
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Old 09-18-2011, 07:50 AM   #2
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LOL. 38 views, and no one knows, or wants to shed any light?
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Old 09-18-2011, 07:51 AM   #3
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see if your wheels are tight.
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Old 09-18-2011, 08:02 AM   #4
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I would check for hub play, sounds wheel bearing like to me. Does it sound similar to a badly cupped tire?
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Old 09-18-2011, 04:19 PM   #5
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Start with tires, cupped or belt bad, or lugs loose (done it before).

CV joints go bad, have Jacks CV joint in the garage. Look to see if the CV boot is torn, See CV diagnostics.

Hubs and brakes next.
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Old 09-18-2011, 05:08 PM   #6
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I agree with oliver. Usually this sounds like a tire issue. I sell tires all day long and 99% of the time when they have a whomp whomp sound its tires. Could be choppy from the alignment or have a bad belt. If there is a question as to how bad they are you could try rotating that tire to the opposite side and see if you hear it on the other side, or if they are directional tires rotate it to the rear to see if the sound changes. If it is still there then I would start looking at the bearing. As someone else stated you could shake it down to see if it seems to have any play in it.

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Old 09-18-2011, 05:27 PM   #7
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don't wheel bearing usually make noises when you are turning? Turning right the left bearing is out?
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Old 09-18-2011, 09:01 PM   #8
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haha. come back 12 hrs later, and theres all sorts of response! Thanks for the insight. I did forget to mention that I changed out the front wheels/tires with my snow set because I thought I had a flat spot in the original. No luck, same noise.

The CV boots are good, but CVs prolly need to be done anyway. Have a bad inner tie-rod (boot torn, grease gone). Saw that after taking off wheel today. Not really getting any play in the hub, but Im still suspecting a wheel bearing.

Has anyone seen/found the "Jack Straw method" for wheel bearings link?!? Searched again, and nothing...

Never done a wheel bearing in a c900 - only on a Honda Civic. Any fun surprises I should look forward to?
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