<div dir="auto">Although one may be difficult to find there is no substitute for a spare gearbox 3rd motion shaft for this job.<div dir="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="auto"><a href="https://precisionsportscar.com/laycock-de-normanville-overdrive-installation-tool/">https://precisionsportscar.com/laycock-de-normanville-overdrive-installation-tool/</a></div><div dir="auto"> it is a simple task to lower the overdrive onto the gearbox. </div><div dir="auto"><br></div><div dir="auto">M</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon., Jun. 19, 2023, 11:41 p.m. Bob Spidell, <<a href="mailto:bspidell@comcast.net">bspidell@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<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="https://mossmotors.com/ahy-041-overdrive-unit-bn2-thru-bj8" target="_blank" rel="noreferrer">https://mossmotors.com/ahy-041-overdrive-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 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).<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="cite">
<div style="font-family:Comic Sans MS,sans-serif;font-size:16px">
<div dir="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="ltr">Gary Hodson</div>
</div>
<br>
</blockquote>
<br>
</div>
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