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TkxNo change to noise before and after universal change out.rg
----- Original Message -----
From: John Harper <ah100register@gmail.com>
To: Roger Grace <roggrace@telus.net>
Cc: healeylist <healeys@autox.team.net>
Sent: Thu, 20 Aug 2020 12:11:04 -0600 (MDT)
Subject: Re: [Healeys] Mystery noise
Roger
As you have said that you have changed both universals, is there chance that
you have reassembled the shaft out of phase? This is easily fitted wrongly.
Both universals have to be exactly in line and you should be able to see small
pointers engraved on each side of the sliding sections that have to line up so
that splines are correctly aligned.
On Thu, 20 Aug 2020 at 18:27, Roger Grace via Healeys <healeys@autox.team.net>
wrote:
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.Tkxrg
_______________________________________________
Archive: http://www.team.net/pipermail/healeyshttp://autox.team.net/archive
Healeys@autox.team.net
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--
Best wishes
John Harper
AHC UK 100 Register Secretary
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<html><head><style> body {height: 100%; color:#000000; font-size:12pt; font=
-family:arial,helvetica,sans-serif;}</style></head><body><div>Tkx<br data-m=
ce-bogus=3D"1"></div><div>No change to noise before and after universal cha=
nge out.</div><div>rg<br></div><div><br></div><div>----- Original Message -=
----<br>From: John Harper <ah100register@gmail.com><br>To: Roger Grac=
e <roggrace@telus.net><br>Cc: healeylist <healeys@autox.team.net&g=
t;<br>Sent: Thu, 20 Aug 2020 12:11:04 -0600 (MDT)<br>Subject: Re: [Healeys]=
Mystery noise<br></div><div><br></div><div dir=3D"ltr">Roger<div><br></div=
><div>As you have said that you have changed both universals, is there chan=
ce that you have reassembled the shaft out of phase? This is easily fitted =
wrongly. Both universals have to be exactly in line and you should be able =
to see small pointers engraved on each side of the sliding sections th=
at have to line up so that splines are correctly aligned.</div></div><div><=
br></div><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">O=
n Thu, 20 Aug 2020 at 18:27, Roger Grace via Healeys <<a href=3D"mailto:=
healeys@autox.team.net" target=3D"_blank" data-mce-href=3D"mailto:healeys@a=
utox.team.net">healeys@autox.team.net</a>> wrote:<br></div><blockquote c=
lass=3D"gmail_quote" style=3D"margin: 0px 0px 0px 0.8ex; border-left: 1px s=
olid #cccccc; padding-left: 1ex;" data-mce-style=3D"margin: 0px 0px 0px 0.8=
ex; border-left: 1px solid #cccccc; padding-left: 1ex;"><div><div><div>AH p=
eople - fighting a noise in my BJ8 that may or may not be serious.</div><di=
v>Reluctant to tear out the tranny unnecessarily and then to find it was so=
mething simple !<br></div><div> </div><div>Notice it at low speed (pro=
bably exists at driving speed but too much wind and engine <br>noise) if sh=
ift 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 <b=
r>prop shaft speed.</div><div> </div><div>At first thought that it was=
at wheel speed and from R side.</div><div>So changed out the R wheel beari=
ng.</div><div>No improvement</div><div> </div><div>Then while looking =
below noted that universals had some play.</div><div>So changed out both un=
iversals.</div><div>Rear brakes not dragging and no binding of wheels.</div=
><div>No improvement.</div><div> </div><div>Did listening on hoist wit=
h others listening too. Consensus was that there was a noise at rear OD are=
a 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 no=
ise while coasting in N.</div><div> </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 ax=
le 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></d=
iv><div><div><br></div><div>To verify is not diff removed one of the rear s=
eats and noise doesn't appear to be coming from diff area.<br></div><div>Di=
sconnecting prop shaft to isolate diff not possible as need the inertia of =
the rear wheels to produce the pulsing.</div></div><div> </div><div>Ab=
out 5k miles ago I changed out the larger OD front bearing (sourced from <b=
r>Moss ... ?) in the OD.</div><div>OD works fine and transmission shifts an=
d works OK without unusual <br>noises.</div><div><br></div><div>The pulsati=
ng/cyclical nature of the noise baffles me and not consistent <br>with a be=
aring failure ?</div><div><br></div><div>Given that it occurs in neutral wi=
th 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 gea=
rbox 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 ci=
rclip 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 ap=
preciated from the more experienced among us.<div>Tkx</div><div>rg<br></div=
></div></div>_______________________________________________<br><div><br></=
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div><br clear=3D"all"></div><div><br></div><div>-- <br></div><div dir=3D"lt=
r" class=3D"gmail_signature"><div dir=3D"ltr">Best wishes<div><br></div><di=
v>John Harper</div><div><br></div><div>AHC UK 100 Register Secretary</div><=
/div></div><div><br></div><div><br></div></body></html>
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_______________________________________________
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