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Although one may be difficult to find there is no substitute for a spare
gearbox 3rd motion shaft for this job.
The spare shaft is used to align all the internals then, using my special
tool to hold the pump plunger retracted
https://precisionsportscar.com/laycock-de-normanville-overdrive-installation-tool/
it is a simple task to lower the overdrive onto the gearbox.
M
On Mon., Jun. 19, 2023, 11:41 p.m. Bob Spidell, <bspidell@comcast.net>
wrote:
> There is a bronze thrust washer that has to be perfectly centered to get
> that last 3/4" (#148 in this diagram):
>
> https://mossmotors.com/ahy-041-overdrive-unit-bn2-thru-bj8
>
> You can wiggle it around with a long screwdriver, or use a suitable
> 'drift' to center it. Your best bet is to sit the O/D on end and lower the
> gearbox onto it; gently rotating the gearbox while lowering. First time I
> did this I must have got lucky, but danged if I can explain this (see
> attached photo). Most recently I fought for a couple days then threw in the
> towel and took gearbox and O/D to BCS which, fortunately, is only a
> half-hour away. David and his mechanics had a novel technique I've not
> heard described anywhere; basically, he removed the pump completely--it's
> only two screws IIRC--and split the O/D into front and rear sections and
> tipped the gearbox and O/D up--gearbox on bottom--then had two of his
> mechanics pull the sections together with huge channellock pliers while
> David rotated the output shaft to 'feel it in' (you had to be there).
>
> Good luck. Make triply sure you have the pump cam oriented correctly, or
> you'll get more experience with this process than you probably want.
>
> bs
>
> On 6/19/2023 6:18 PM, warthodson--- via Healeys wrote:
>
> I spent the day assisting a friend trying to mate his OD to his
> transmission. The car is a '63 BJ7. The overdrive & Trans. were pulled to
> replace a few internal trans parts which was done & we did not run into any
> issues. We can get the OD to within approx. 1/2-3/4" of mating to the
> trans, but cannot close that gap. We have confirmed that the oil pump
> roller has been fully retracted. What are we bumping up against & how do we
> get past it?
> Gary Hodson
>
>
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--0000000000000e153105fe8e2b43
Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto">Although one may be difficult to find there is no substit=
ute for a spare gearbox 3rd motion shaft for this job.<div dir=3D"auto">The=
spare shaft is used to align all the internals then, using my special tool=
to hold the pump plunger retracted</div><div dir=3D"auto"><a href=3D"https=
://precisionsportscar.com/laycock-de-normanville-overdrive-installation-too=
l/">https://precisionsportscar.com/laycock-de-normanville-overdrive-install=
ation-tool/</a></div><div dir=3D"auto">=C2=A0it is a simple task to lower t=
he overdrive onto the gearbox.=C2=A0</div><div dir=3D"auto"><br></div><div =
dir=3D"auto">M</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" c=
lass=3D"gmail_attr">On Mon., Jun. 19, 2023, 11:41 p.m. Bob Spidell, <<a =
href=3D"mailto:bspidell@comcast.net";>bspidell@comcast.net</a>> wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex">
=20
=20
=20
<div>
There is a bronze thrust washer that has to be perfectly centered to
get that last 3/4" (#148 in this diagram):<br>
<br>
<a href=3D"https://mossmotors.com/ahy-041-overdrive-unit-bn2-thru-bj8"; =
target=3D"_blank" rel=3D"noreferrer">https://mossmotors.com/ahy-041-overdri=
ve-unit-bn2-thru-bj8</a><br>
<br>
You can wiggle it around with a long screwdriver, or use a suitable
'drift' to center it. Your best bet is to sit the O/D on end an=
d
lower the gearbox onto it; gently rotating the gearbox while
lowering. First time I did this I must have got lucky, but danged if
I can explain this (see attached photo). Most recently I fought for
a couple days then threw in the towel and took gearbox and O/D to
BCS which, fortunately, is only a half-hour away. David and his
mechanics had a novel technique I've not heard described anywhere;
basically, he removed the pump completely--it's only two screws
IIRC--and split the O/D into front and rear sections and tipped the
gearbox and O/D up--gearbox on bottom--then had two of his mechanics
pull the sections together with huge channellock pliers while David
rotated the output shaft to 'feel it in' (you had to be there).=
<br>
<br>
Good luck. Make triply sure you have the pump cam oriented
correctly, or you'll get more experience with this process than you
probably want.<br>
<br>
bs<br>
<br>
<div>On 6/19/2023 6:18 PM, warthodson--- via
Healeys wrote:<br>
</div>
<blockquote type=3D"cite">
=20
<div style=3D"font-family:Comic Sans MS,sans-serif;font-size:16px">
<div dir=3D"ltr">I spent the day assisting a
friend trying to mate his OD to his transmission. The car is a
'63 BJ7. The overdrive & Trans. were pulled to replace a
few internal trans parts which was done & we did not run
into any issues. We can get the OD to within approx. 1/2-3/4"=
;
of mating to the trans, but cannot close that gap. We have
confirmed that the oil pump roller has been fully retracted.
What are we bumping up against & how do we get past it?</div>
<div dir=3D"ltr">Gary Hodson</div>
</div>
<br>
</blockquote>
<br>
</div>
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</blockquote></div>
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