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Pretty sure dave Nock nailed it..
On 8/20/2020 3:01 PM, Roger Grace via Healeys wrote:
> M,
> Thank you and always respect your experienced input.
> Did you perhaps listen to the file ?
> OK will try this again; but when cut engine without prop shaft it
> stops abruptly.
> Will try to listen with engine running.
> Also I have have the impression that it is when torque direction is
> from wheels spinning and trying to overrun the transmission - like
> coasting.
> Will report back.
> Tkx
> rg
>
> ----- Original Message -----
> From: Michael Salter <michaelsalter@gmail.com>
> To: Roger Grace <roggrace@telus.net>
> Cc: healeylist <healeys@autox.team.net>
> Sent: Thu, 20 Aug 2020 13:05:23 -0600 (MDT)
> Subject: Re: [Healeys] Mystery noise
>
> Hi Roger, you say "Disconnecting prop shaft to isolate diff not
> possible as need the inertia of the rear wheels to produce the pulsing."
> I think that is unlikely and would look into that more closely.
> If you can get access to a "Chassis Ear" that would probably help a lot.
>
> M
>
>
> On Thu., Aug. 20, 2020, 1:28 p.m. Roger Grace via Healeys,
>
> AH people - fighting a noise in my BJ8 that may or may not be serious.
> Reluctant to tear out the tranny unnecessarily and then to find it
> was something simple !
> Notice it at low speed (probably exists at driving speed but too
> much wind and engine
> noise) if shift to neutral and cut ignition to minimize engine and
> exhaust noise.
> Noise is pulsating - like a tire with a bad spot but seems to be at
> prop shaft speed.
> At first thought that it was at wheel speed and from R side.
> So changed out the R wheel bearing.
> No improvement
> Then while looking below noted that universals had some play.
> So changed out both universals.
> Rear brakes not dragging and no binding of wheels.
> No improvement.
> Did listening on hoist with others listening too. Consensus was
> that there was a noise at rear OD area as well as the pulsating one.
>
> So pulled annulus in situ and replaced both rear bearings. Quieter
> but still the pulsating noise while coasting in N.
> Sound file enclosed is a road test from about 15 MPH then shift to
> N and cut engine. Tunnel cover off.
>
> Able to replicate noise with engine on axle stands but not by
> turning a rear wheel by hand or with an e motor.
>
> Noise does appear to come from transmission.
>
> To verify is not diff removed one of the rear seats and noise
> doesn't appear to be coming from diff area.
> Disconnecting prop shaft to isolate diff not possible as need the
> inertia of the rear wheels to produce the pulsing.
> About 5k miles ago I changed out the larger OD front bearing
> (sourced from
> Moss ... ?) in the OD.
> OD works fine and transmission shifts and works OK without unusual
> noises.
>
> The pulsating/cyclical nature of the noise baffles me and not
> consistent
> with a bearing failure ?
>
> Given that it occurs in neutral with no gears meshing it surely is
> not a bad gear tooth etc.
> OD not engaged so it is locked so not likely there.
> Removed gearbox top cover and did inspection - nothing obvious.
> So to my mind this only leaves the GB rear bearing ?
> Or maybe a broken circlip or thrust washer and probably on main
> shaft external to gearbox ?
> or half shaft ?
>
> Any comments/thoughts appreciated from the more experienced among us.
> Tkx
> rg
> _______________________________________________
>
> Support Team.Net http://www.team.net/donate.html
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> Is
>
>
>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
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--
Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World
go here: WWW.PORTERBIKES.COM/
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<p>Pretty sure dave Nock nailed it..<br>
</p>
<div class="moz-cite-prefix">On 8/20/2020 3:01 PM, Roger Grace via
Healeys wrote:<br>
</div>
<blockquote type="cite"
cite="mid:177754257.7612631.1597957285661.JavaMail.zimbra@mailid.telus.net">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<style> body {height: 100%; color:#000000; font-size:12pt;
font-family:arial,helvetica,sans-serif;}</style>
<div>M,<br>
</div>
<div>Thank you and always respect your experienced input.<br
data-mce-bogus="1">
</div>
<div>Did you perhaps listen to the file ?<br data-mce-bogus="1">
</div>
<div>OK will try this again; but when cut engine without prop
shaft it stops abruptly.<br data-mce-bogus="1">
</div>
<div>Will try to listen with engine running.<br data-mce-bogus="1">
</div>
<div>Also I have have the impression that it is when torque
direction is from wheels spinning and trying to overrun the
transmission - like coasting.<br data-mce-bogus="1">
</div>
<div>Will report back.</div>
<div>Tkx<br data-mce-bogus="1">
</div>
<div>rg<br data-mce-bogus="1">
</div>
<div><br>
</div>
<div>----- Original Message -----<br>
From: Michael Salter <a class="moz-txt-link-rfc2396E"
href="mailto:michaelsalter@gmail.com";><michaelsalter@gmail.com></a><br>
To: Roger Grace <a class="moz-txt-link-rfc2396E"
href="mailto:roggrace@telus.net";><roggrace@telus.net></a><br>
Cc: healeylist <a class="moz-txt-link-rfc2396E"
href="mailto:healeys@autox.team.net";><healeys@autox.team.net></a><br>
Sent: Thu, 20 Aug 2020 13:05:23 -0600 (MDT)<br>
Subject: Re: [Healeys] Mystery noise<br>
</div>
<div><br>
</div>
<div dir="auto">
<div>Hi Roger, you say "<span style="font-family: sans-serif;
font-size: 12.8px;" data-mce-style="font-family: sans-serif;
font-size: 12.8px;">Disconnecting prop shaft to isolate diff
not possible as need the inertia of the rear wheels to
produce </span><span style="font-family: sans-serif;
font-size: 12.8px;" data-mce-style="font-family: sans-serif;
font-size: 12.8px;">the pulsing."</span></div>
<div dir="auto"><span data-mce-style="font-family: sans-serif;"
style="font-family: sans-serif;" face="sans-serif"><span
style="font-size: 12.8px;" data-mce-style="font-size:
12.8px;">I think that is unlikely and would look into that
more closely.</span></span></div>
<div dir="auto"><span data-mce-style="font-family: sans-serif;"
style="font-family: sans-serif;" face="sans-serif"><span
style="font-size: 12.8px;" data-mce-style="font-size:
12.8px;">If you can get access to a "Chassis Ear" that
would probably help a lot.</span></span></div>
<div dir="auto"><span data-mce-style="font-family: sans-serif;"
style="font-family: sans-serif;" face="sans-serif"><span
style="font-size: 12.8px;" data-mce-style="font-size:
12.8px;"><br>
</span></span></div>
<div dir="auto"><span data-mce-style="font-family: sans-serif;"
style="font-family: sans-serif;" face="sans-serif"><span
style="font-size: 12.8px;" data-mce-style="font-size:
12.8px;">M</span></span></div>
<div dir="auto"><span data-mce-style="font-family: sans-serif;"
style="font-family: sans-serif;" face="sans-serif"><span
style="font-size: 12.8px;" data-mce-style="font-size:
12.8px;"><br>
</span></span><br>
<div class="gmail_quote" dir="auto">
<div dir="ltr" class="gmail_attr">On Thu., Aug. 20, 2020,
1:28 p.m. Roger Grace via Healeys, <<a
href="mailto:healeys@autox.team.net"; target="_blank"
data-mce-href="mailto:healeys@autox.team.net";
moz-do-not-send="true">healeys@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin: 0 0 0 .8ex;
border-left: 1px #ccc solid; padding-left: 1ex;"
data-mce-style="margin: 0 0 0 .8ex; border-left: 1px #ccc
solid; padding-left: 1ex;">
<div>
<div>
<div>AH people - fighting a noise in my BJ8 that may
or may not be serious.</div>
<div>Reluctant to tear out the tranny unnecessarily
and then to find it was something simple !<br>
</div>
<div>Â </div>
<div>Notice it at low speed (probably exists at
driving speed but too much wind and engine <br>
noise) if shift to neutral and cut ignition to
minimize engine and exhaust noise.</div>
<div>Noise is pulsating - like a tire with a bad spot
but seems to be at <br>
prop shaft speed.</div>
<div>Â </div>
<div>At first thought that it was at wheel speed and
from R side.</div>
<div>So changed out the R wheel bearing.</div>
<div>No improvement</div>
<div>Â </div>
<div>Then while looking below noted that universals
had some play.</div>
<div>So changed out both universals.</div>
<div>Rear brakes not dragging and no binding of
wheels.</div>
<div>No improvement.</div>
<div>Â </div>
<div>Did listening on hoist with others listening too.
Consensus was that there was a noise at rear OD area
as well as the pulsating one.</div>
<div><br>
</div>
<div>So pulled annulus in situ and replaced both rear
bearings. Quieter but still the pulsating noise
while coasting in N.</div>
<div>Â </div>
<div>Sound file enclosed is a road test from about 15
MPH then shift to N and cut engine. Tunnel cover
off.<br>
</div>
<div><br>
</div>
<div>Able to replicate noise with engine on axle
stands but not by turning a rear wheel by hand or
with an e motor.<br>
</div>
<div><br>
</div>
<div>Noise does appear to come from transmission.<br>
</div>
<div>
<div><br>
</div>
<div>To verify is not diff removed one of the rear
seats and noise doesn't appear to be coming from
diff area.<br>
</div>
<div>Disconnecting prop shaft to isolate diff not
possible as need the inertia of the rear wheels to
produce the pulsing.</div>
</div>
<div>Â </div>
<div>About 5k miles ago I changed out the larger OD
front bearing (sourced from <br>
Moss ... ?) in the OD.</div>
<div>OD works fine and transmission shifts and works
OK without unusual <br>
noises.</div>
<div><br>
</div>
<div>The pulsating/cyclical nature of the noise
baffles me and not consistent <br>
with a bearing failure ?</div>
<div><br>
</div>
<div>Given that it occurs in neutral with no gears
meshing it surely is not a bad gear tooth etc.<br>
</div>
<div>OD not engaged so it is locked so not likely
there.<br>
</div>
<div>Removed gearbox top cover and did inspection -
nothing obvious.<br>
</div>
<div>So to my mind this only leaves the GB rear
bearing ?</div>
<div>Or maybe a broken circlip or thrust washer and
probably on main shaft external to gearbox ?<br>
</div>
<div>or half shaft ?<br>
</div>
<div><br>
</div>
Any comments/thoughts appreciated from the more
experienced among us.
<div>Tkx</div>
<div>rg<br>
</div>
</div>
</div>
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<div><br>
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Is<br>
</blockquote>
</div>
</div>
</div>
<div><br>
</div>
<div><br>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre"
wrap="">_______________________________________________
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/healeys";>http://www.team.net/pipermail/healeys</a>
<a class="moz-txt-link-freetext"
href="http://autox.team.net/archive";>http://autox.team.net/archive</a>
<a class="moz-txt-link-abbreviated"
href="mailto:Healeys@autox.team.net";>Healeys@autox.team.net</a>
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href="http://autox.team.net/mailman/listinfo/healeys";>http://autox.team.net/mailman/listinfo/healeys</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World
go here: <a class="moz-txt-link-abbreviated"
href="http://WWW.PORTERBIKES.COM/";>WWW.PORTERBIKES.COM/</a></pre>
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