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<p>A 4.10:1 ratio would be incorrect for a BN1. That ratio was standard on the Hypoid axle cars (BN2-BJ7) but the spiral bevel axles had a standard ratio of 4.125:1.</p>
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<p>Bill Lawrence</p>
<p>BN1 #554 </p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Healeys <healeys-bounces@autox.team.net> on behalf of BJ8Healeys <sbyers@ec.rr.com><br>
<b>Sent:</b> Monday, September 18, 2017 9:56:01 PM<br>
<b>To:</b> 'Healey List'<br>
<b>Subject:</b> Re: [Healeys] Axle Numbers</font>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#002060">4638 is the rear axle serial number. I don't know if the prefix "BN1" (?) is part of the serial number, but there is no such prefix for BJ8 rear axle serial numbers.
The 10/41 is the differential ratio (10 pinion teeth to 41 crown wheel teeth. Usually written as ratio 41/10 = 4.1
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#002060">Steve Byers</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#002060">HBJ8L/36666</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#002060">BJ8 Registry</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#002060">AHCA Delegate at Large</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#002060">Havelock, NC
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Healeys [mailto:healeys-bounces@autox.team.net]
<b>On Behalf Of </b>Michael MacLean<br>
<b>Sent:</b> Monday, September 18, 2017 2:08 PM<br>
<b>To:</b> Healey List<br>
<b>Subject:</b> [Healeys] Axle Numbers<o:p></o:p></span></p>
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<p class="MsoNormal">Can someone decipher these numbers I found on the axle?<o:p></o:p></p>
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