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<DIV>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.</DIV>
<DIV> </DIV>
<DIV>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 .</DIV>
<DIV> </DIV>
<DIV>But that's not the whole story.</DIV>
<DIV> </DIV>
<DIV>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 <A
href="http://www.mgb-stuff.org.uk/ps.htm">http://www.mgb-stuff.org.uk/ps.htm</A>
<DIV> </DIV></DIV>
<DIV>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.</DIV>
<DIV> </DIV>
<DIV>PaulH.</DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV><BR></DIV>
<DIV dir=ltr></DIV>
<DIV dir=ltr> The sliding joint (sleeve & spline) end is
forward, toward the gearbox.</DIV>
<DIV dir=ltr> 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.</DIV>
<DIV dir=ltr>Bob</DIV>
<DIV dir=ltr><BR></DIV>
<DIV dir=ltr><BR>On Aug 25, 2021, at 3:29 PM, <<A
href="mailto:jimray@hartcom.net">jimray@hartcom.net</A>> <<A
href="mailto:jimray@hartcom.net">jimray@hartcom.net</A>>
wrote:<BR><BR></DIV>
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<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial',sans-serif; FONT-SIZE: 14pt">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’ve seen examples of both
configurations.<O:P></O:P></SPAN></P></DIV></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>