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Re: [Healeys] OD switch

To: healeys@autox.team.net
Subject: Re: [Healeys] OD switch
From: Bob Spidell via Healeys <healeys@autox.team.net>
Date: Fri, 18 Oct 2024 19:53:51 -0700
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
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Note the kickdown can be used to, uh, kick down. Say you're following 
slow traffic in top/OD, and you see a chance to pass coming up; you 
throw the dash switch and when it's clear you stomp on the accelerator 
pedal, the O/D will disengage and you're in a lower gear to pass. 
Doesn't work great--I usually drop a gear too--but it's doable. Note 
older cars with automatics usually have them, rigged to the throttle 
linkage.

Triumphs, and others, also have a beefier accumulator for faster 
engagement (a mod sold by DWM and others).


On 10/18/2024 4:44 PM, Simon Lachlan via Healeys wrote:
>
> Michael,
>
> Yes, agreed. He said the same to me in a discussion as to why Triumphs 
> donâ??t have the kickdown whereas the Healeys do. Actually that wasnâ??t 
> long after your visit.
>
> (Dave Twigger is pretty much The Man in the UK overdrive world. So far 
> as I recall, his father-in-law bought all the overdrive spares when 
> Laycock stopped manufacturing. Or something like that. Bit like Fred 
> at AH Spares? Heâ??s a nice guy, very helpful.)
>
> Simon
>
> *From:*Healeys <healeys-bounces@autox.team.net> *On Behalf Of *Michael 
> Salter
> *Sent:* 18 October 2024 23:25
> *To:* Don Day <fsufan1952@yahoo.com>
> *Cc:* healey list <healeys@autox.team.net>
> *Subject:* Re: [Healeys] OD switch
>
> As explained to me Dave Twigger the purpose of the kickdown switch is 
> to prevent the overdrive unit being subjected to reverse torque which 
> it is not designed to handle.
>
> As I  understand it, if the overdrive is treated with respect, and the 
> clutch is used during disengagement there will be no problems but, if 
> you flip the switch off when cruising at high speed without using the 
> clutch to minimize the reverse loading on the overdrive, the planetary 
> gear assembly can be severly damaged.
>
> The kickdown switch prevents this.
>
> M
>
> On Fri., Oct. 18, 2024, 4:18 p.m. Don via Healeys, 
> <healeys@autox.team.net> wrote:
>
>     Hi All
>           I installed the new OD brass drain plug with the o ring and
>     so far ð?¤?ð??»not a drip of oil anywhere. I think itâ??s a great design
>     by Cape International.
>     I did see someone posted about eliminating the od switch on the
>     firewall and just needing to use the switch on the dash . No more
>     needing to Blip the throttle to activate the od . Could that
>     someone please explain the wiring needed to make this change . It
>     sounds like another modern up grade to make our driving experience
>     easier.
>           Thanks as always , Don
>     Sent from my iPhone
>     _______________________________________________
>     Support Team.Net http://www.team.net/donate.html
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>     <http://autox.team.net/mailman/options/healeys/michaelsalter@gmailcom>
>
>
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    Note the kickdown can be used to, uh, kick down. Say you're
    following slow traffic in top/OD, and you see a chance to pass
    coming up; you throw the dash switch and when it's clear you stomp
    on the accelerator pedal, the O/D will disengage and you're in a
    lower gear to pass. Doesn't work great--I usually drop a gear
    too--but it's doable. Note older cars with automatics usually have
    them, rigged to the throttle linkage.<br>
    <br>
    Triumphs, and others, also have a beefier accumulator for faster
    engagement (a mod sold by DWM and others).<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 10/18/2024 4:44 PM, Simon Lachlan
      via Healeys wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:003001db21b7$a57a2960$f06e7c20$@alexarevel.plus.com">
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      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-family:&quot;Times New 
Roman&quot;,serif;mso-fareast-language:EN-US">Michael,
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:&quot;Times New 
Roman&quot;,serif;mso-fareast-language:EN-US">Yes,
            agreed. He said the same to me in a discussion as to why
            Triumphs donâ??t have the kickdown whereas the Healeys do.
            Actually that wasnâ??t long after your visit.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:&quot;Times New 
Roman&quot;,serif;mso-fareast-language:EN-US">(Dave
            Twigger is pretty much The Man in the UK overdrive world. So
            far as I recall, his father-in-law bought all the overdrive
            spares when Laycock stopped manufacturing. Or something like
            that. Bit like Fred at AH Spares? Heâ??s a nice guy, very
            helpful.)<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:&quot;Times New 
Roman&quot;,serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:&quot;Times New 
Roman&quot;,serif;mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:&quot;Times New 
Roman&quot;,serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
        <div
style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
          <p class="MsoNormal"><b><span lang="EN-US"
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
              lang="EN-US"
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
              Healeys <a class="moz-txt-link-rfc2396E" 
href="mailto:healeys-bounces@autox.team.net";>&lt;healeys-bounces@autox.team.net&gt;</a>
 <b>On
                Behalf Of </b>Michael Salter<br>
              <b>Sent:</b> 18 October 2024 23:25<br>
              <b>To:</b> Don Day <a class="moz-txt-link-rfc2396E" 
href="mailto:fsufan1952@yahoo.com";>&lt;fsufan1952@yahoo.com&gt;</a><br>
              <b>Cc:</b> healey list <a class="moz-txt-link-rfc2396E" 
href="mailto:healeys@autox.team.net";>&lt;healeys@autox.team.net&gt;</a><br>
              <b>Subject:</b> Re: [Healeys] OD switch<o:p></o:p></span></p>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <p class="MsoNormal">As explained to me Dave Twigger the
            purpose of the kickdown switch is to prevent the overdrive
            unit being subjected to reverse torque which it is not
            designed to handle.<o:p></o:p></p>
          <div>
            <p class="MsoNormal">As I  understand it, if the overdrive
              is treated with respect, and the clutch is used during
              disengagement there will be no problems but, if you flip
              the switch off when cruising at high speed without using
              the clutch to minimize the reverse loading on the
              overdrive, the planetary gear assembly can be severly
              damaged. <o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal">The kickdown switch prevents 
this.<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal">M<o:p></o:p></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <div>
            <p class="MsoNormal">On Fri., Oct. 18, 2024, 4:18 p.m. Don
              via Healeys, &lt;<a href="mailto:healeys@autox.team.net";
                moz-do-not-send="true" 
class="moz-txt-link-freetext">healeys@autox.team.net</a>&gt;
              wrote:<o:p></o:p></p>
          </div>
          <blockquote
style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 
6.0pt;margin-left:4.8pt;margin-right:0cm">
            <p class="MsoNormal" style="margin-bottom:12.0pt">Hi All <br>
                    I installed the new OD brass drain plug with the o
              ring and so far <span
style="font-family:&quot;Segoe UI Emoji&quot;,sans-serif">ð?¤?ð??»</span>not
              a drip of oil anywhere. I think itâ??s a great design by
              Cape International. <br>
              I did see someone posted about eliminating the od switch
              on the firewall and just needing to use the switch on the
              dash . No more needing to Blip the throttle to activate
              the od . Could that someone please explain the wiring
              needed to make this change . It sounds like another modern
              up grade to make our driving experience easier. <br>
                    Thanks as always , Don <br>
              Sent from my iPhone<br>
              _______________________________________________<br>
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