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Well that's a new one on me Bob. I have installed dozens of overdrive units
and never encountered that problem.
Obviously it would tend to indicate some kind of dimensional difference
between the 2 gearbox shafts but I'm sure that you would have checked that.
Please let me know if you find out what the problem is.
M
On Tue, Jun 20, 2023 at 10:15=E2=80=AFAM warthodson@aol.com <warthodson@aol=
.com>
wrote:
> Michael,
> We do have a spare trans output shaft & we have watched your video & made
> a wire tool to retract the pump plunger. We have verified that the plunge=
r
> is fully retracted & the splines are aligned. The spare shaft goes in abo=
ut
> 1/2" (all the way in) further than the one that came out of the car.
> Gary
>
> On Tuesday, June 20, 2023 at 07:12:20 AM CDT, Michael Salter <
> michaelsalter@gmail.com> wrote:
>
>
> 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-installat=
ion-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 th=
e
> 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 t=
he
> 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 a=
ny
> 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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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,sa=
ns-serif;font-size:small">Well that's a new one on me Bob. I have insta=
lled dozens of overdrive units and never encountered that problem.</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,sans-serif;font-size:s=
mall">Obviously it would tend to indicate some kind of dimensional differen=
ce between the 2 gearbox shafts but I'm sure that you would have checke=
d that. <br></div><div class=3D"gmail_default" style=3D"font-family:arial,s=
ans-serif;font-size:small">Please let me know if you find out what the prob=
lem is.</div><div class=3D"gmail_default" style=3D"font-family:arial,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,sans-serif;font-size:small">M<br></div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,sans-serif;font-size:small"><br></div></di=
v><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On T=
ue, Jun 20, 2023 at 10:15=E2=80=AFAM <a href=3D"mailto:warthodson@aol.com";>=
warthodson@aol.com</a> <<a href=3D"mailto:warthodson@aol.com";>warthodson=
@aol.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D=
"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-le=
ft:1ex"><div><div style=3D"font-family:Comic Sans MS,sans-serif;font-size:1=
6px"><div></div>
<div dir=3D"ltr">Michael,</div><div dir=3D"ltr">We do have a spare =
trans output shaft & we have watched your video & made a wire tool =
to retract the pump plunger. We have verified that the plunger is fully ret=
racted & the splines are aligned. The spare shaft goes in about 1/2&quo=
t; (all the way in) further than the one that came out of the car.=C2=A0</d=
iv><div dir=3D"ltr">Gary</div><div><br></div>
=20
</div><div id=3D"m_5526164326890697486ydpd0cdbba8yahoo_quoted_75742=
82779">
<div style=3D"font-family:"Helvetica Neue",Helvetica,=
Arial,sans-serif;font-size:13px;color:rgb(38,40,42)">
=20
<div>
On Tuesday, June 20, 2023 at 07:12:20 AM CDT, Michael S=
alter <<a href=3D"mailto:michaelsalter@gmail.com"; target=3D"_blank">mich=
aelsalter@gmail.com</a>> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id=3D"m_5526164326890697486ydpd0cdbba8yiv85032914=
82"><div><div>Although one may be difficult to find there is no substitute =
for a spare gearbox 3rd motion shaft for this job.<div>The spare shaft is u=
sed to align all the internals then, using my special tool to hold the pump=
plunger retracted</div><div><a shape=3D"rect" href=3D"https://precisionspo=
rtscar.com/laycock-de-normanville-overdrive-installation-tool/" rel=3D"nofo=
llow" target=3D"_blank">https://precisionsportscar.com/laycock-de-normanvil=
le-overdrive-installation-tool/</a></div><div>=C2=A0it is a simple task to =
lower the overdrive onto the gearbox.=C2=A0</div><div><br clear=3D"none"></=
div><div>M</div></div><br clear=3D"none"><div><div id=3D"m_5526164326890697=
486ydpd0cdbba8yiv8503291482yqt62544"><div dir=3D"ltr">On Mon., Jun. 19, 202=
3, 11:41 p.m. Bob Spidell, <<a shape=3D"rect" href=3D"mailto:bspidell@co=
mcast.net" rel=3D"nofollow" target=3D"_blank">bspidell@comcast.net</a>> =
wrote:<br clear=3D"none"></div><blockquote style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);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 clear=3D"none">
<br clear=3D"none">
<a shape=3D"rect" href=3D"https://mossmotors.com/ahy-041-overdrive-unit=
-bn2-thru-bj8" rel=3D"nofollow" target=3D"_blank">https://mossmotors.com/ah=
y-041-overdrive-unit-bn2-thru-bj8</a><br clear=3D"none">
<br clear=3D"none">
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 clear=3D"none">
<br clear=3D"none">
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 clear=3D"none">
<br clear=3D"none">
bs<br clear=3D"none">
<br clear=3D"none">
<div>On 6/19/2023 6:18 PM, warthodson--- via
Healeys wrote:<br clear=3D"none">
</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 clear=3D"none">
</blockquote>
<br clear=3D"none">
</div>
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