Crazy buzzing in the rear
Thread Starter
Instructor
Joined: Sep 2021
Posts: 140
Likes: 70
From: North Texas
Crazy buzzing in the rear
I have this profound harmonic rattle/buzz from the rear of the car. It sounds like it’s in the cabin with me but no matter what I press on back behind me, it doesn’t stop. Only happens at certain rpm but it really ruins the experience of driving the car. It’s been like this since I got it a few weeks ago. I suppose it could be something underneath but it sounds like the rear deck area right behind my head.
any commonly known culprits for a noise like this in that area?
Appreciate any insight as it’s driving me crazy and I haven’t been able to pinpoint the source.
Thanks!
any commonly known culprits for a noise like this in that area?
Appreciate any insight as it’s driving me crazy and I haven’t been able to pinpoint the source.
Thanks!
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
Hard to pinpoint but here's a few things to consider
Some mufflers drone at certain rpm, but I'm guessing it's not that type of noise
Check the exhaust isn't close to anything, especially the mufflers vs spare tire carrier and the pipes vs the spring or diff
Check the spare tire carrier, especially if it's empty
Parking brake cables where they split and go across towards the trailing arms
Anything loose or moveable in the jack compartment
or any of the other million things that it could be
M
Also make sure the gas filler lid has it's spring and rubber bumpers so it isn't moving around but that's behind the bulkhead so less likely to make noise inside where you could hear it
Some mufflers drone at certain rpm, but I'm guessing it's not that type of noise
Check the exhaust isn't close to anything, especially the mufflers vs spare tire carrier and the pipes vs the spring or diff
Check the spare tire carrier, especially if it's empty
Parking brake cables where they split and go across towards the trailing arms
Anything loose or moveable in the jack compartment
or any of the other million things that it could be
M
Also make sure the gas filler lid has it's spring and rubber bumpers so it isn't moving around but that's behind the bulkhead so less likely to make noise inside where you could hear it
Melting Slicks
Joined: Nov 2006
Posts: 3,411
Likes: 1,821
From: Apple Valley, MN
What is the rpm range that it occurs at? What mph range? Does it go away if you move past that range (e.g. noise starts at 45, goes away at 55)? What gear? Assuming you are experiencing it in the highest gear, try selecting the next lowest gear and see if it is related to engine speed vs driveline speed.
Thread Starter
Instructor
Joined: Sep 2021
Posts: 140
Likes: 70
From: North Texas
What is the rpm range that it occurs at? What mph range? Does it go away if you move past that range (e.g. noise starts at 45, goes away at 55)? What gear? Assuming you are experiencing it in the highest gear, try selecting the next lowest gear and see if it is related to engine speed vs driveline speed.
I swear if it's the fuel door I'm just gonna turn in my car guy card and take up gardening.
Last edited by jelliott25; Dec 9, 2021 at 08:37 AM. Reason: spelling
Melting Slicks
Joined: Feb 2007
Posts: 2,709
Likes: 269
From: S.E. MI
St. Jude Donor '15
I had a relay with a metal housing in my jack compartment that was vibrating and creating a lot of noise. I am not sure what that relay was for, it looked factory installed but had no wires going to it.
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Thread Starter
Instructor
Joined: Sep 2021
Posts: 140
Likes: 70
From: North Texas
Well I'm off to the garden center to pick out some plants and garden trowel.
It is indeed the fuel filler door making all of the noise. One of the rubber isolation pads is missing so I stuffed some packing paper in the fuel filler and took a spin. No more buzz. Ordered some parts from zip corvette so hopefully that'll get it worked out. Thanks everyone. I wish I had thought of it sooner. I really appreciate all the input.
I would never have thought such a small thing could make SO much noise.
It is indeed the fuel filler door making all of the noise. One of the rubber isolation pads is missing so I stuffed some packing paper in the fuel filler and took a spin. No more buzz. Ordered some parts from zip corvette so hopefully that'll get it worked out. Thanks everyone. I wish I had thought of it sooner. I really appreciate all the input.
I would never have thought such a small thing could make SO much noise.
Thread Starter
Instructor
Joined: Sep 2021
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From: North Texas
Is my vette stock?? HAHA
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I had the buzz from my tank lid. Replaced the rubber bumpers and it finally stopped. I had the buzz on an old truck which was related to the muffler and the heat shields buzzed on a Subaru...I agree its always annoying