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<div>If that overdrive has the governor switch at the rear (which it =
should) I would check that, as it keeps the car in overdrive over 40 MPH =
and can be troublesome if dirty or broken. Regards, =
Hank<br>-------------------- <br><br>From: "Bob Haskell via Healeys" =
<healeys@autox.team.net> <br>Reply-To: "Bob Haskell" =
<rchaskell@earthlink.net> <br>To: "Patrick and Caroline Quinn" <p.=
cquinn@outlook.com>, "Healeys" <healeys@autox.team.net> <br>Sent: =
August 24, 2025 at 5:57 AM PDT <br>Subject: Re: [Healeys] Odd Overdrive =
Electrics </div>
<p>Patrick,</p>
<p>Thinking out loud here. The =
hydraulic pump in the overdrive is always supplying pressure. When =
you turn the OD switch to Overdrive the solenoid moves a linkage in the =
overdrive to open the hydraulic valve. When you flip the OD switch to=
Normal, the throttle switch keeps the solenoid energized so the hydraulic =
valve is still open. When you press on the accelerator pedal, the =
solenoid de-energizes, the hydraulic valve closes and the OD goes to direct=
.</p>
<p>It seems like the hydraulic valve is moving since the OD goes to =
direct when you press on the throttle. So, the solenoid would have to=
be energized to move the valve again.</p>
<p>When you first start out, =
with the OD in Normal, it doesn't attempt to go into Overdrive, right?</p>
<p>When I am coming to a stop with the car in Overdrive, I flip the switch =
to Normal, put the gearbox in neutral, and blip the throttle. I then move =
the gear shift lever left and right. If I hear the solenoid engaging =
when I'm next to 3rd/4th and disengaging next to 1st/2nd, I know the OD =
solenoid circuit is still energized and blip the throttle again. </p>
<p>If you put the gearbox in neutral, do you hear the solenoid when you =
move the gear shift lever left/right?</p>
<p>Cheers,</p>
<pre class=3D"moz-signature">Bob Haskell
Austin-Healey 3000 roadster =
registrar</pre>
<div class=3D"moz-cite-prefix">On 8/24/25 05:27, Patrick =
and Caroline Quinn wrote:</div>
<blockquote>
<div class=3D"WordSection1">
<p class=3D"MsoNormal">G’day</p>
<p class=3D"MsoNormal"> </p>
<p class=3D"MsoNormal">Thank you to those who responded concerning how best=
to adjust the overdrive throttle switch.</p>
<p class=3D"MsoNormal"> =
</p>
<p class=3D"MsoNormal">Well I did what was suggested and have the =
overdrive cutting out when the accelerator is pressed about a fifth of the =
throttle opening.</p>
<p class=3D"MsoNormal"> </p>
<p class=3D"MsoNormal">I wish that was as simple as that, because =
what’s happening next is confusing.</p>
<p class=3D"MsoNormal"> =
</p>
<p class=3D"MsoNormal">What’s happening is that I could be =
driving along in top overdrive. Flick the switch to “Normal” =
and it behaves as it should, staying in overdrive. Press down on the =
accelerator and it changes down to direct top. So far so good.</p>
<p class=3D"MsoNormal">Ease up on the accelerator and does it stay in =
direct top? No, it goes back into overdrive even though the dash switch is =
still on “Normal”.</p>
<p class=3D"MsoNormal"> </p>
<p class=3D"MsoNormal">Any ideas?</p>
<p class=3D"MsoNormal"> </p>
<p class=3D"MsoNormal">Hoo Roo</p>
<p class=3D"MsoNormal"> </p>
<p class=3D"MsoNormal">Patrick Quinn</p>
<p class=3D"MsoNormal">Blue =
Mountains, Australia</p>
</div>
<br>
<pre class=3D"moz-quote-pre">_________=
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</pre>
</blockquote>
<div> </div>
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