Subject: [Healeys] Overdrive ratios

From: Michael Salter <[email-masked]>
Date: Wed, 15 Jul 2026 16:05:08 +0000

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I have 2 BN1 overdrives which I'm struggling to identify.
Unlike the later type "A" units the serial number on these is not prefixed =
with the ratio.
The serial numbers on these are :
1260/288
and
1292/2037
Anyone with information which would help identify the ratios of these?
Thanks.

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<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
I have 2 BN1 overdrives which I'm struggling to identify.</div>
<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
Unlike the later type &quot;A&quot; units the serial number on these is not=
 prefixed with the ratio.</div>
<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
The serial numbers on these are :</div>
<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
1260/288</div>
<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
and</div>
<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
1292/2037</div>
<div style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, Robot=
o, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, 33);" =
dir=3D"auto">
Anyone with information which would help identify the ratios of these?</div=
<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
Thanks.</div>
<div id=3D"ms-outlook-mobile-body-separator-line" data-applydefaultfontstyl=
es=3D"true" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system=
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id=3D"ms-outlook-mobile-signature" dir=3D"auto">
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system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
<br>
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_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive/healeys

[email-masked]
http://autox.team.net/mailman/listinfo/healeys

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From: Hank Leach via Healeys <[email-masked]>
Date: Wed, 15 Jul 2026 16:33:04 +0000 idx7u8gQ3bstEXfdGc9oSUm3VVyJSxdfaBMNeBx2wKKM2vzKjjXk2Wc2SKdAYQIcOdBSleERCL3Wof+dcg++STB5kuE+oQ33B31JC5WcXrTSG8W8xkD4U0d6

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<div>Michael- the 1260 is the early 32% OD. The 1292 is the 100 common 28% =
ratio. After that ODs for BN2s were 1308-28% and 1447-28%.</div>
<div>&nbsp;</div>
<div>I actually have an OD case #105 but 288 is a low =
serial number. Regards, Hank<br>-------------------- <br><br>From: "Michael=
 Salter" &lt;[email-masked]&gt; <br>To: &lt;[email-masked].=
net&gt; <br>Sent: July 15, 2026 at 9:22 AM PDT <br>Subject: [Healeys] =
Overdrive ratios </div>
<div style=3D"font-family: Aptos, =
Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; =
font-size: 12pt; color: rgb(33, 33, 33);">I have 2 BN1 overdrives which I'm=
 struggling to identify.</div>
<div style=3D"font-family: Aptos, =
Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; =
font-size: 12pt; color: rgb(33, 33, 33);">Unlike the later type "A" units =
the serial number on these is not prefixed with the ratio.</div>
<div style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, =
Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, =
33);">The serial numbers on these are :</div>
<div style=3D"font-family: =
Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, =
sans-serif; font-size: 12pt; color: rgb(33, 33, 33);">1260/288</div>
<div style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, =
Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, =
33);">and</div>
<div style=3D"font-family: Aptos, Aptos_MSFontService, =
-apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; =
color: rgb(33, 33, 33);">1292/2037</div>
<div style=3D"font-family: Aptos, =
Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; =
font-size: 12pt; color: rgb(33, 33, 33);">Anyone with information which =
would help identify the ratios of these?</div>
<div style=3D"font-family: =
Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, =
sans-serif; font-size: 12pt; color: rgb(33, 33, 33);">Thanks.</div>
<div id=3D"ms-outlook-mobile-body-separator-line" style=3D"font-family: =
Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, =
sans-serif; font-size: 12pt;">
<div style=3D"font-family: Aptos, =
Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; =
font-size: 12pt;">&nbsp;</div>
</div>
<div id=3D"ms-outlook-mobile-signatur=
e" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto,=
 Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, 33);">
<div style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, =
Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, =
33);">&nbsp;</div>
</div>
<div>&nbsp;</div>

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[email-masked]

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From: Michael Salter <[email-masked]>
Date: Wed, 15 Jul 2026 16:35:02 +0000

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Thanks Hank. Very much appreciated.

M

________________________________
From: Hank Leach <[email-masked]>
Sent: Wednesday, 15 July 2026 12:33:04
To: Michael Salter <[email-masked]>; [email-masked] <heal=
[email-masked]>
Subject: RE: [Healeys] Overdrive ratios

Michael- the 1260 is the early 32% OD. The 1292 is the 100 common 28% ratio=
. After that ODs for BN2s were 1308-28% and 1447-28%.

I actually have an OD case #105 but 288 is a low serial number. Regards, Ha=
nk
--------------------

From: "Michael Salter" <[email-masked]>
To: <[email-masked]>
Sent: July 15, 2026 at 9:22 AM PDT
Subject: [Healeys] Overdrive ratios
I have 2 BN1 overdrives which I'm struggling to identify.
Unlike the later type "A" units the serial number on these is not prefixed =
with the ratio.
The serial numbers on these are :
1260/288
and
1292/2037
Anyone with information which would help identify the ratios of these?
Thanks.

--_000_BY5PR04MB693115E5926B3A3E9F323D62A1F82BY5PR04MB6931namp_
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system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
3, 33, 33);">
Thanks Hank. Very much appreciated.&nbsp;</div>
<div dir=3D"auto" style=3D"font-family: Aptos, Aptos_MSFontService, -apple-=
system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(3=
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<br>
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<div id=3D"ms-outlook-mobile-signature" dir=3D"auto" style=3D"font-family: =
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erif; font-size: 12pt; color: rgb(33, 33, 33);">
<div style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, Robot=
o, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, 33);">
<br>
</div>
</div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Hank Leach &lt;gradea=
[email-masked]&gt;<br>
<b>Sent:</b> Wednesday, 15 July 2026 12:33:04<br>
<b>To:</b> Michael Salter &lt;[email-masked]&gt;; [email-masked]=
eam.net &lt;[email-masked]&gt;<br>
<b>Subject:</b> RE: [Healeys] Overdrive ratios</font>
<div>&nbsp;</div>
</div>
<div>
<div>Michael- the 1260 is the early 32% OD. The 1292 is the 100 common 28% =
ratio. After that ODs for BN2s were 1308-28% and 1447-28%.</div>
<div>&nbsp;</div>
<div>I actually have an OD case #105 but 288 is a low serial number. Regard=
s, Hank<br>
-------------------- <br>
<br>
From: &quot;Michael Salter&quot; &lt;[email-masked]&gt; <br>
To: &lt;[email-masked]&gt; <br>
Sent: July 15, 2026 at 9:22 AM PDT <br>
Subject: [Healeys] Overdrive ratios </div>
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
I have 2 BN1 overdrives which I'm struggling to identify.</div>
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
Unlike the later type &quot;A&quot; units the serial number on these is not=
 prefixed with the ratio.</div>
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
The serial numbers on these are :</div>
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
1260/288</div>
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
and</div>
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
1292/2037</div>
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
Anyone with information which would help identify the ratios of these?</div=
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
Thanks.</div>
<div id=3D"x_ms-outlook-mobile-body-separator-line" style=3D"font-family:Ap=
tos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; fo=
nt-size:12pt">
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt">
&nbsp;</div>
</div>
<div id=3D"x_ms-outlook-mobile-signature" style=3D"font-family:Aptos,Aptos_=
MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; font-size:12=
pt; color:rgb(33,33,33)">
<div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif; font-size:12pt; color:rgb(33,33,33)">
&nbsp;</div>
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<div>&nbsp;</div>
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[email-masked]

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From: Hank Leach via Healeys <[email-masked]>
Date: Wed, 15 Jul 2026 17:47:08 +0000 mO5RFtvuE8WbvLCOsqZFuWPn5siUmhE4QmD2lmmDYLbmtXSXbb9rsMC0A2wdKh0id4spdpz/rG5gtGg4PqDDyJ9GdfKDwa2k/xJvblq1CBObktHqMKs1hq5z

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<div>Overdrives for AH 100 were installed as follows:</div>
<div>OD 1260 (32%) was used up to 140204 (not practical in use)</div>
<div>OD 1292 was used on chassis 140205-228046</div>
<div>OD 1308 started at 1 to 228046</div>
<div>OD 1447 was used on chassis =
(BN2) 228047-230489 (with some exceptions)</div>
<div>&nbsp;</div>
<div>Later cars, including BJ8 went to a 22% unit.</div>
<div><br>-------------------- <br><br>From: "Michael Salter" &lt;michael.=
[email-masked]&gt; <br>To: &lt;[email-masked]&gt;, &lt;healeys@autox=
.team.net&gt; <br>Sent: July 15, 2026 at 9:35 AM PDT <br>Subject: Re: =
[Healeys] Overdrive ratios </div>
<div style=3D"font-family: Aptos, =
Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; =
font-size: 12pt; color: rgb(33, 33, 33);">Thanks Hank. Very much =
appreciated.&nbsp;</div>
<div style=3D"font-family: Aptos, =
Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; =
font-size: 12pt; color: rgb(33, 33, 33);">&nbsp;</div>
<div style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, =
Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, =
33);">M</div>
<div id=3D"ms-outlook-mobile-body-separator-line" =
style=3D"font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, =
Arial, Helvetica, sans-serif; font-size: 12pt;">
<div style=3D"font-family:=
 Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, =
sans-serif; font-size: 12pt;">&nbsp;</div>
</div>
<div =
id=3D"ms-outlook-mobile-signature" style=3D"font-family: Aptos, =
Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; =
font-size: 12pt; color: rgb(33, 33, 33);">
<div style=3D"font-family: Aptos=
, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif;=
 font-size: 12pt; color: rgb(33, 33, 33);">&nbsp;</div>
</div>
<hr style=3D"display: inline-block; width: 98%;">
<div =
id=3D"divRplyFwdMsg"><strong>From:</strong> Hank Leach &lt;gradea1@charter.=
net&gt;<br><strong>Sent:</strong> Wednesday, 15 July 2026 =
12:33:04<br><strong>To:</strong> Michael Salter &lt;michael.salter@gmail.=
com&gt;; [email-masked] &lt;[email-masked].=
net&gt;<br><strong>Subject:</strong> RE: [Healeys] Overdrive ratios
<div>&nbsp;</div>
</div>
<div>
<div>Michael- the 1260 is the early 32% OD. =
The 1292 is the 100 common 28% ratio. After that ODs for BN2s were 1308-28%=
 and 1447-28%.</div>
<div>&nbsp;</div>
<div>I actually have an OD case #105=
 but 288 is a low serial number. Regards, Hank<br>-------------------- =
<br><br>From: "Michael Salter" &lt;[email-masked]&gt; <br>To: =
&lt;[email-masked]&gt; <br>Sent: July 15, 2026 at 9:22 AM PDT =
<br>Subject: [Healeys] Overdrive ratios</div>
<div style=3D"font-family: =
Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; =
font-size: 12pt; color: rgb(33,33,33);">I have 2 BN1 overdrives which I'm =
struggling to identify.</div>
<div style=3D"font-family: Aptos,=
Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; =
font-size: 12pt; color: rgb(33,33,33);">Unlike the later type "A" units the=
 serial number on these is not prefixed with the ratio.</div>
<div style=3D"font-family: Aptos,Aptos_MSFontService,-apple-system,Roboto,=
Arial,Helvetica,sans-serif; font-size: 12pt; color: rgb(33,33,33);">The =
serial numbers on these are :</div>
<div style=3D"font-family: Aptos,=
Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; =
font-size: 12pt; color: rgb(33,33,33);">1260/288</div>
<div style=3D"font-family: Aptos,Aptos_MSFontService,-apple-system,Roboto,=
Arial,Helvetica,sans-serif; font-size: 12pt; color: rgb(33,33,=
33);">and</div>
<div style=3D"font-family: Aptos,Aptos_MSFontService,=
-apple-system,Roboto,Arial,Helvetica,sans-serif; font-size: 12pt; color: =
rgb(33,33,33);">1292/2037</div>
<div style=3D"font-family: Aptos,=
Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; =
font-size: 12pt; color: rgb(33,33,33);">Anyone with information which would=
 help identify the ratios of these?</div>
<div style=3D"font-family: Aptos,=
Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; =
font-size: 12pt; color: rgb(33,33,33);">Thanks.</div>
<div id=3D"x_ms-outlook-mobile-body-separator-line" style=3D"font-family: =
Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; =
font-size: 12pt;">
<div style=3D"font-family: Aptos,Aptos_MSFontService,=
-apple-system,Roboto,Arial,Helvetica,sans-serif; font-size: =
12pt;">&nbsp;</div>
</div>
<div id=3D"x_ms-outlook-mobile-signature" =
style=3D"font-family: Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,=
Helvetica,sans-serif; font-size: 12pt; color: rgb(33,33,33);">
<div style=3D"font-family: Aptos,Aptos_MSFontService,-apple-system,Roboto,=
Arial,Helvetica,sans-serif; font-size: 12pt; color: rgb(33,33,=
33);">&nbsp;</div>
</div>
<div>&nbsp;</div>
</div>

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[email-masked]

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