healeys
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Re: Weird noises

To: "Bob Spidell" <bspidell@comcast.net>, <healeys@autox.team.net>
Subject: Re: Weird noises
From: "David" <dcrawfor@san.rr.com>
Date: Tue, 16 Aug 2005 08:07:50 -0700
Thanks, Bob.  Looking into that soon.  I only know the pictures.
Hehe.
Kidding a little, but I know enough not to mess with something I could
most likely make worse.  I will respond as soon as we discover
the cause.

david
----- Original Message -----
From: Bob Spidell
To: David ; healeys@autox.team.net
Sent: Tuesday, August 16, 2005 7:07 AM
Subject: Re: Weird noises


I'm no O/D expert, but I know how it works.

When the O/D is not engaged, the cone clutch, annular gear, sun gear
and planetary gears rotate as a unit; i.e. in effect it's a straight
shaft.
When the O/D is engaged, the sun gear is locked, the planetary gears
rotate about the sun gear and the annular (ring) gear is over-driven
by
the planetary gears.  If you hear noise only when the O/D is engaged,
something is amiss in the moving parts; e.g. a chipped gear or
similar.

There is also a "uni-directional clutch"--it's a roller clutch--whose
purpose
is not exactly clear to me.  But I suspect if it was the cause of the
noise
you would hear it whether the O/D was engaged or not.

BTW, can anybody explain how/what the uni-directional clutch is for?

bs
***************************************************************
Bob Spidell         San Jose, CA        bspidell@comcast.net
'67 Austin-Healey 3000             '56 Austin-Healey 100M
***************************************************************

Subject: Weird noises


> Esteemed Listers,
>
> While diving my BN1 about 3,000/3,200rpm in overdrive, accelerating
> or on compression, I notice a rapid ratting - but like a playing
card
> in
> the spokes of a bike. Not there in standard or in neutral.  An
> overdrive
> problem about to bite me you know where?
>
> At first it sounded like a tach or speedo cable unwinding but I
> removed
> them to test and the noise, like the force, is still with me. I
await
> your
> 'best guess' suggestions as I am really not sure what to do.  This
> needs to be fixed.  All responses most appreciated and answered.
>
> Most ignorantly,
>
> David C
> San Diego




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