YOUR RESEARCHLoud Humming Noise between 40mph and 50mph
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 3 captured posts examined · 0 partial discussions
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Today I bought a 2000 911 Convertible Automatic Transmission with 25k miles and discovered a loud humming noise coming from the rear that begins every time I hit 40 mph and stops after 50 mph. It is much louder than the engine or muffler sound. It also stops as soon as I release the gas pedal or place the car on cruise control. So it only happens when I am accelerating between 40 mph and 50 mph. Any and all of your suggestions will be greatly appreciated.
I drove with a technician today and he said that the sound is normal for an automatic on this model and the Boxter. He said it was RPM related and that it was air traveling through manifold. Your thoughts?
So webmartinez, how did this progress? Was it really RPM related? I have the same humming sound issue with my 99 911 996. I was contemplating whether this is caused by worn out rear wheel bearings..? But since the humming only occurs when the gas pedal is pressed or when you accelarate, maybe its coming from a low level tranny AT fluid/oil..?
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