I think I read a thread about that. Might have been yours?

And speaking of resonators.....

ya know this occurred to me earlier today.

The speedo area on my '81 cluster was too small to somehow mount the
PCB and I didn't have a proper plastic box for the PCB, so I made a
metal box and put strips of foam on the bottom to electrically
insulate the bottom of the PBC. Maybe it's dampening the sound of the
buzzer.

Hmmmm.....

On Sun, Oct 26, 2008 at 7:30 PM, John Bange <jbange@gmail.com> wrote:
>> Mine will cause me to eat 5 Xanax like Tic-Tacs if I have to hear for more
>> than a few seconds, it is nerve-rattling. .....

> Yeah, when the oil-change monkey knocked the wire loose on mine, I
> thought I was going to have a heart attack when it went off. Perhaps
> the speedo case acts as a resonator, because that buzzer ought to
> sound like the stall warning on a 707...
>