Subject: Re: [Mgs] Driveshaft orientation

From: Robert's New iPad <[email-masked]>
Date: Wed, 25 Aug 2021 15:53:50 -0400

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   The sliding joint (sleeve & spline) end is forward, toward the gearbox.
    As the driveshaft may have been separated at the sliding joint (they wil=
l pull apart when off the car), check that the yokes of the universal joints=
 are aligned.
Bob

> On Aug 25, 2021, at 3:29 PM, <[email-masked]> <[email-masked]> wro=
te:
>=20
> Can anyone give me the correct orientation (front to back) of the drivesha=
ft on an 80 MGB. Does the end with the sleeve and spline connect to the diff=
erential or the transmission. I=E2=80=99ve seen examples of both configurati=
ons.
> =20
> Thanks,
> =20
> Jim Ray
> _______________________________________________
>=20
> [email-masked]
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>=20
> Unsubscribe: http://autox.team.net/mailman/options/mgs/[email-masked]

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">&nb=
sp; &nbsp;The sliding joint (sleeve &amp; spline) end is forward, toward the=
 gearbox.</div><div dir=3D"ltr">&nbsp; &nbsp; As the driveshaft may have bee=
n separated at the sliding joint (they will pull apart when off the car), ch=
eck that the yokes of the universal joints are aligned.</div><div dir=3D"ltr=
">Bob</div><div dir=3D"ltr"><br></div><div dir=3D"ltr"><br>On Aug 25, 2021, a=
t 3:29 PM, &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&=
gt; &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wro=
te:<br><br></div><blockquote type=3D"cite"><div dir=3D"ltr"><meta http-equiv=
=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"><meta name=3D"Ge=
nerator" content=3D"Microsoft Word 15 (filtered medium)"><style><!--
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--><div class=3D"WordSection1"><p class=3D"Ms=
oNormal"><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-=
serif">Can anyone give me the correct orientation (front to back) of the dri=
veshaft on an 80 MGB. Does the end with the sleeve and spline connect to the=
 differential or the transmission. I=E2=80=99ve seen examples of both config=
urations.<o:p></o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-si=
ze:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></span>=
</p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt;font-family:&quot=
;Arial&quot;,sans-serif">Thanks,<o:p></o:p></span></p><p class=3D"MsoNormal"=
><span style=3D"font-size:14.0pt;font-family:&quot;Arial&quot;,sans-serif"><=
o:p>&nbsp;</o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-size:1=
4.0pt;font-family:&quot;Arial&quot;,sans-serif">Jim Ray<o:p></o:p></span></p=
></div></div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>_=
______________________________________________</span><br><span></span><br><s=
pan><a href=3D"mailto:[email-masked]">[email-masked]</a></span><br><=
span>Donate: <a href=3D"http://www.team.net/donate.html">http://www.team.net=
/donate.html</a></span><br><span>Suggested annual donation &nbsp;$12.75</spa=
n><br><span></span><br><span>Archive: <a href=3D"http://www.team.net/piperma=
il/mgs">http://www.team.net/pipermail/mgs</a> <a href=3D"http://autox.team.n=
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an>Unsubscribe: <a href=3D"http://autox.team.net/mailman/options/mgs/mgbobh@=
gmail.com">http://autox.team.net/mailman/options/mgs/[email-masked]</a></s=
pan><br></div></blockquote></body></html>=

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From: "PaulHunt73" <[email-masked]>
Date: Thu, 26 Aug 2021 08:28:36 +0100 EkMNPXThHEWmrej8+Ykd8ysG2zrrohuBqchI36h3rvVQsvwxCyV4drEqwplywCXBWwuoLEZCZNBLwH30GbmuXk3AIND6vYTCL1GkL76olD5f669QrW3r1nVV +JczfyJmjc79ZgAZ3ciYDA==

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Yes the sliding joint only ever goes towards the gearbox, and the UJs do =
have to be aligned correctly.  My Haynes has an exploded drawing showing =
them incorrectly aligned and assembled drawing showing them correct.  My =
WSM is correct.  It's much easier to show in a picture of course, but =
I'll try describing it in less than 1000 words.

The flange halves of the UJs must have their axes in the same direction =
as each other i.e. if the gearbox flange half is vertical then the axle =
flange half must be vertical as well.  Get it wrong and you get =
excessive wear in the UJs .

But that's not the whole story.

As said the sliding joint comes apart which means it can be reassembled =
in as many ways as there are splines.  Two of these ways will give the =
correct flange orientation, but only one of them is how the shaft would =
have been balanced originally.  Get them 180 degrees out and you could =
get significant imbalance and vibration.  There should be alignment =
marks on the two halves of the sliding joint but they are often missing =
and even when there are very faint.  More info with pictures here =
http://www.mgb-stuff.org.uk/ps.htm

Both Haynes and the WSM make great play about when removing the =
propshaft you should mark the flanges it goes back on the car as it came =
off.  That's a nice to have, but it's not essential, as the shaft is =
balanced as a unit and should run correctly whichever way the pairs of =
flanges are bolted up to each other.  After all, if you were buying a =
new propshaft the flanges wouldn't have been marked.

PaulH.
  ----- Original Message -----=20

     The sliding joint (sleeve & spline) end is forward, toward the =
gearbox.
      As the driveshaft may have been separated at the sliding joint =
(they will pull apart when off the car), check that the yokes of the =
universal joints are aligned.
  Bob

  On Aug 25, 2021, at 3:29 PM, <[email-masked]> <[email-masked]> =
wrote:

    Can anyone give me the correct orientation (front to back) of the =
driveshaft on an 80 MGB. Does the end with the sleeve and spline connect =
to the differential or the transmission. I=E2=80=99ve seen examples of =
both configurations.

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<BODY dir=3Dauto bgColor=3D#ffffff>
<DIV>Yes the sliding joint only ever goes towards the gearbox, and the =
UJs do=20
have to be aligned correctly.&nbsp; My Haynes has an exploded drawing =
showing=20
them incorrectly aligned and assembled drawing showing them =
correct.&nbsp; My=20
WSM is correct.&nbsp; It's much easier to show in a picture of course, =
but I'll=20
try describing it in less than 1000 words.</DIV>
<DIV>&nbsp;</DIV>
<DIV>The flange halves of the UJs must have their axes in the same =
direction as=20
each other i.e. if the gearbox flange half is vertical then the axle =
flange half=20
must be vertical as well.&nbsp; Get it wrong and you get excessive wear =
in the=20
UJs .</DIV>
<DIV>&nbsp;</DIV>
<DIV>But that's not the whole story.</DIV>
<DIV>&nbsp;</DIV>
<DIV>As said the sliding joint comes apart which means it can be =
reassembled in=20
as many ways as there are splines.&nbsp; Two of these ways will give the =
correct=20
flange orientation, but only one of them is how the shaft would have =
been=20
balanced originally.&nbsp; Get them 180 degrees out and you could get=20
significant imbalance and vibration.&nbsp; There should be alignment =
marks on=20
the two halves of the sliding joint but they are often missing and even =
when=20
there are very faint.&nbsp; More info with pictures here <A=20
href=3D"http://www.mgb-stuff.org.uk/ps.htm">http://www.mgb-stuff.org.uk/p=
s.htm</A>
<DIV>&nbsp;</DIV></DIV>
<DIV>Both Haynes and the WSM make great play about when removing the =
propshaft=20
you should mark the flanges it goes back on the car as it came =
off.&nbsp; That's=20
a nice to have, but it's not essential, as the shaft is balanced as a =
unit and=20
should run correctly whichever way the pairs of flanges are&nbsp;bolted =
up to=20
each other.&nbsp; After all, if you were buying a new propshaft the =
flanges=20
wouldn't have been marked.</DIV>
<DIV>&nbsp;</DIV>
<DIV>PaulH.</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV><BR></DIV>
  <DIV dir=3Dltr></DIV>
  <DIV dir=3Dltr>&nbsp; &nbsp;The sliding joint (sleeve &amp; spline) =
end is=20
  forward, toward the gearbox.</DIV>
  <DIV dir=3Dltr>&nbsp; &nbsp; As the driveshaft may have been separated =
at the=20
  sliding joint (they will pull apart when off the car), check that the =
yokes of=20
  the universal joints are aligned.</DIV>
  <DIV dir=3Dltr>Bob</DIV>
  <DIV dir=3Dltr><BR></DIV>
  <DIV dir=3Dltr><BR>On Aug 25, 2021, at 3:29 PM, &lt;<A=20
  href=3D"mailto:[email-masked]">[email-masked]</A>&gt; &lt;<A=20
  href=3D"mailto:[email-masked]">[email-masked]</A>&gt;=20
  wrote:<BR><BR></DIV>
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    <P class=3DMsoNormal><SPAN=20
    style=3D"FONT-FAMILY: 'Arial',sans-serif; FONT-SIZE: 14pt">Can =
anyone give me=20
    the correct orientation (front to back) of the driveshaft on an 80 =
MGB. Does=20
    the end with the sleeve and spline connect to the differential or =
the=20
    transmission. I=E2=80=99ve seen examples of both=20
    =
configurations.<O:P></O:P></SPAN></P></DIV></DIV></BLOCKQUOTE></BLOCKQUOT=
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