Strange noise
Thread Starter
Melting Slicks
Joined: Jan 2010
Posts: 2,024
Likes: 4
From: Austin TX
Strange noise
'88 Coupe, 54k miles, all stock.
A sort of knocking noise coming from the back end while driving. Usually not noticeable until about 30mph, but sometimes it's really quiet, and sometimes it's awfully loud. When it's loud, it's only loud for a short period of time.
What could be the problem?
A sort of knocking noise coming from the back end while driving. Usually not noticeable until about 30mph, but sometimes it's really quiet, and sometimes it's awfully loud. When it's loud, it's only loud for a short period of time.
What could be the problem?
Corvette Enthusiast
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From: So. Cal.
2025 C7 of the Year Finalist- Unmodified
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vette
Driveshaft u joints, alxe u joints, rear wheel bearings.
Thread Starter
Melting Slicks
Joined: Jan 2010
Posts: 2,024
Likes: 4
From: Austin TX
Corvette Enthusiast
Joined: Oct 2007
Posts: 6,790
Likes: 2,697
From: So. Cal.
2025 C7 of the Year Finalist- Unmodified
2024 C7 of the Year Finalist - Unmodified
2023 C7 of the Year Finalist - Unmodified
Thread Starter
Melting Slicks
Joined: Jan 2010
Posts: 2,024
Likes: 4
From: Austin TX
Advance Auto Parts says they don't think it's the rear wheel bearings, because they'd make more of a howl than a clunk. So I think it's the U-Joints. Is there a guide for that around here?
Race Director
Joined: Apr 2003
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From: moraga ca
Does it happen over rough roads or on any road? If the smoothness of the road makes a difference, could be exhaust; mufflers or tailpipe. If it clunks shifting between drive and reverse, it's a ujoint going out.
Thread Starter
Melting Slicks
Joined: Jan 2010
Posts: 2,024
Likes: 4
From: Austin TX
Road smoothness doesn't seem to matter. I'll have to check about shifting between drive and reverse, but I know shifting through the gears doesn't do anything. The sound will be going along, clunk-clunk-clunk, and the car will shift without affecting the sound.
