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Since the GT6 gearbox has a different gearset than the Spitfire has, I can't
see how that would work. The first gear for the 3-rail Spitfire has a ratio of
3.75 compared to 2.65 for the GT6, therefore the input shaft gear won't mesh
with the gears in the GT6 box. Here is a link to the summary of what I did way
back in 2000 when I adapted a Mk3 GT6 gearbox to work with a small journal 1296
that I used in my autocross prepared Mk1 Spit:
https://www.geocities.ws/MotorCity/Speedway/1080/gt6boxtospit.html.
Joe
> On 10/12/2023 9:31 AM EDT Barr, Scott via Fot <fot@autox.team.net> wrote:
>
>
>
> When I had this done some years ago, I took the job to a local
> racer-transmission guy. After fiddling with it a bit, he just put the
> Spitfire input shaft into the GT6 trans and it worked fine. GT6 gearbox for
> my Spit racer, no cutting, welding, etc. required. It worked great for a few
> seasons until I pulled it to install an overdrive trans.
>
>
>
> Could just be luck? I understand that there are a number of variations of
> gear constructions and maybe I just happened to bring him two that matched?
> Who knows. But it worked for me.
>
>
>
> Scott (B.)
>
>
>
> From: Fot <fot-bounces@autox.team.net> On Behalf Of Rod Pierce via Fot
> Sent: Thursday, October 12, 2023 7:57 AM
> To: Rod Pierce via Fot <fot@autox.team.net>
> Subject: [Fot] GT6-Spitfire Transmission Conversion
>
>
>
> I have a GT6 transmission in my spares collection and I have heard they can
> be converted to run in a Spitfire.
>
>
>
> I'm interested in accomplishing this over the winter and I am looking for
> information/advice on the best way to do it.
>
>
>
> It is my understanding that you can have the GT6 input shaft either machined
> to fit or you can cut the input shafts from a GT6 and a Spitfire and weld the
> Spitfire on the GT6 transmission.
>
>
>
> Thanks
>
>
>
>
>
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/spitlist@cox.net
>
>
>
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Since the GT6 gearbox has a different gearset than the Spitfire has, I can't
see how that would work. The first gear for the 3-rail Spitfire has a
ratio of 3.75 compared to 2.65 for the GT6, therefore the input shaft gear
won't mesh with the gears in the GT6 box. Here is a link to the summary
of what I did way back in 2000 when I adapted a Mk3 GT6 gearbox to work with a
small journal 1296 that I used in my autocross prepared Mk1 Spit: <a
href="https://www.geocities.ws/MotorCity/Speedway/1080/gt6boxtospit.html";>https://www.geocities.ws/MotorCity/Speedway/1080/gt6boxtospit.html</a>.
</div>
<div class="default-style">
</div>
<div class="default-style">
Joe
</div>
<blockquote type="cite">
<div>
On 10/12/2023 9:31 AM EDT Barr, Scott via Fot <fot@autox.team.net>
wrote:
</div>
<div>
</div>
<div>
</div>
<div class="WordSection1">
<p class="MsoNormal">When I had this done some years ago, I took the job to
a local racer-transmission guy. After fiddling with it a bit, he just put
the Spitfire input shaft into the GT6 trans and it worked fine. GT6
gearbox for my Spit racer, no cutting, welding, etc. required. It worked
great for a few seasons until I pulled it to install an overdrive trans.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Could just be luck? I understand that there are
a number of variations of gear constructions and maybe I just happened to bring
him two that matched? Who knows. But it worked for me.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Scott (B.)</p>
<p class="MsoNormal"> </p>
<div style="border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt
0in 0in 0in;">
<p class="MsoNormal"><strong>From:</strong> Fot
<fot-bounces@autox.team.net> <strong>On Behalf Of </strong>Rod Pierce via
Fot<br><strong>Sent:</strong> Thursday, October 12, 2023 7:57
AM<br><strong>To:</strong> Rod Pierce via Fot
<fot@autox.team.net><br><strong>Subject:</strong> [Fot] GT6-Spitfire
Transmission Conversion</p>
</div>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">I have a GT6 transmission in my spares collection and
I have heard they can be converted to run in a Spitfire. </p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">I'm interested in accomplishing this over the winter
and I am looking for information/advice on the best way to do it.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">It is my understanding that you can have the GT6
input shaft either machined to fit or you can cut the input shafts from a GT6
and a Spitfire and weld the Spitfire on the GT6 transmission.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Thanks</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
</div>
</div> _______________________________________________
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</blockquote>
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