<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> </div>
<div>Later cars, including BJ8 went to a 22% unit.</div>
<div><br>-------------------- <br><br>From: "Michael Salter" <michael.salter@gmail.com> <br>To: <gradea1@charter.net>, <healeys@autox.team.net> <br>Sent: July 15, 2026 at 9:35 AM PDT <br>Subject: Re: [Healeys] Overdrive ratios </div>
<div style="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. </div>
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<div id="divRplyFwdMsg"><strong>From:</strong> Hank Leach <gradea1@charter.net><br><strong>Sent:</strong> Wednesday, 15 July 2026 12:33:04<br><strong>To:</strong> Michael Salter <michael.salter@gmail.com>; healeys@autox.team.net <healeys@autox.team.net><br><strong>Subject:</strong> RE: [Healeys] Overdrive ratios
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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>
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<div>I actually have an OD case #105 but 288 is a low serial number. Regards, Hank<br>-------------------- <br><br>From: "Michael Salter" <michael.salter@gmail.com> <br>To: <healeys@autox.team.net> <br>Sent: July 15, 2026 at 9:22 AM PDT <br>Subject: [Healeys] Overdrive ratios</div>
<div style="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="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="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="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="font-family: Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; font-size: 12pt; color: rgb(33,33,33);">and</div>
<div style="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="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="font-family: Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif; font-size: 12pt; color: rgb(33,33,33);">Thanks.</div>
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