Well, it would be nice if it turns out to be the hardtop, it's easier to get
to than the driveshaft. I'll try those tests.
Thanks,
Tom B.
In a message dated 3/2/2006 5:28:44 PM Eastern Standard Time,
doug@dougbraun.com writes:
> With my hardtop on, I get a booming/howling noise from about 2800 to 3000
> rpm.
> This is true even when revving the engine in neutral, so I know it's not the
> driveshaft.
>
> If I open the bonnet and listen and feel the engine when revving it, nothing
> seems wrong. I guess it's just the entire body cavity resonating. I have
> checked my engine mounts, exhaust mounts, etc. and they all seem fine.
>
> You should try the revving-in-neutral test to see if it is the drivetrain.
> Also accelerate to a high speed on the freeway, put it in neutral, kill
> the engine, and coast down to a reasonably slow speed. If you
> have a driveshaft problem it will be obvious (the usual 50mph howl).
>
> Doug Braun
> '72 Spit
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