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--></style></head><body lang=EN-US link=blue vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>I can attest to the uprated <b>AHS</b> accumulator. Installed May 2020 and had pressure </p><p class=MsoNormal>restored to normal 480-500. Symptoms were slow to engage and no engage when hot.</p><p class=MsoNormal>Very scored accumulator/piston was discovered. Job can be done without pulling tranny.</p><p class=MsoNormal><img width=559 height=420 style='width:5.8263in;height:4.375in' id="Picture_x0020_5" src="cid:image003.jpg@01D72249.CFDA0D90"></p><p class=MsoNormal><i>Great guidance and help from this community! Thanks!<o:p></o:p></i></p><p class=MsoNormal>WD 67 BJ8</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:healeys@autox.team.net">Roger Grace via Healeys</a><br><b>Sent: </b>Friday, March 26, 2021 11:19 AM<br><b>To: </b><a href="mailto:bspidell@comcast.net">Bob Spidell</a><br><b>Cc: </b><a href="mailto:healeys@autox.team.net">Healeys</a><br><b>Subject: </b>Re: [Healeys] overdrive problem</p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>I have found OD Spares in UK to always be very helpful and knowledgeable. </p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://www.odspares.com/">http://www.odspares.com/</a></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>They supply the O ring upgraded accumulator and piston set. This piston is slightly larger in diameter than the original.</p></div><div><p class=MsoNormal>As an aside, 2 years after upgrading my BJ8 OD to their accumulator set, the OD pressure still holds 480 psi after a week !!</p></div><div><p class=MsoNormal>rg</p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, Mar 26, 2021 at 7:49 AM Bob Spidell <<a href="mailto:bspidell@comcast.net">bspidell@comcast.net</a>> wrote:</p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=MsoNormal style='margin-bottom:12.0pt'>Enlarging the photo clearly shows beveling on the relief ports.</p><div><p class=MsoNormal>On 3/26/2021 7:39 AM, Bob Spidell wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal style='margin-bottom:12.0pt'>OK, I did the hard work (2 clicks) and dug up the source:<br><br><a href="https://www.ahspares.co.uk/austin-healey/performance-parts/gearbox-overdrive/o-ring-conversion-accumulator-piston.aspx">https://www.ahspares.co.uk/austin-healey/performance-parts/gearbox-overdrive/o-ring-conversion-accumulator-piston.aspx</a><br><br>They claim the housing is modified as well, maybe with bevels on the pressure relief ports?</p><div><p class=MsoNormal>On 3/26/2021 7:34 AM, Michael Salter wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>Bob, I looked into installing "O" rings into an accumulator many years ago but couldn't figure out how to get around the problem presented by the fact that the accumulator relieves pressure by allowing the cast iron rings to pass over radial holes in the body.</span><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>When I tried them the "O" rings were forced into those pressure relief holes and tiny pieces were sliced off at each hole location!!</span><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>How do the accumulators with "O" rings address that issue?</span><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>M</span><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, Mar 26, 2021 at 10:26 AM Bob Spidell <<a href="mailto:bspidell@comcast.net">bspidell@comcast.net</a>> wrote:</p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=MsoNormal style='margin-bottom:12.0pt'>Maybe of interest to some: AFAIK, all O/D accumulators came with metal rings, which likely cause or at least contribute to scoring. One of the Brit suppliers--probably AHS but I'm not sure--has an accumulator setup that uses an O-ring(s) instead of metal rings, which should prevent scoring. I rebuilt my O/D a couple years back, and if I'd known of the O-ring type I would have installed it. Earlier O/Ds used metal rings in the actuator pistons, but later ones had O-rings, and it's logical to conclude LdeN went to O-rings there because of excessive scoring of the cases (or, possibly, because they were cheaper).</p><div><p class=MsoNormal>On 3/26/2021 6:03 AM, Michael Salter via Healeys wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>Time this question was put to bed. </p><div><p class=MsoNormal>1. The throttle switch is not supposed to disengage the overdrive if the dash switch is in the "OVERDRIVE" position. If it does the system is wired incorrectly. (BN1s are a little different)</p></div><div><p class=MsoNormal>2. Overdrives which slip out, slip, or won't engage WHEN HOT but do work when cold are invariably suffering from low oil pressure which is almost always caused by accumulator issues. The "O" rings on the outside of the accumulator sleeve can be a problem but in my experience scoring of the accumulator bore and damage to the rings and piston are a more common cause.</p></div><div><p class=MsoNormal>3. Overdrives and gearboxes in Healeys are meant to be lubricated with engine oil. Decades ago I wrote to Laycock DeNormanville, back when letters went in envelopes with stamps, and received a response from their engineering department indicating clearly that the oil specified for their products was specified by the gearbox manufacturer and whatever they specified was acceptable for the overdrive.</p></div><div><p class=MsoNormal>M</p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri., Mar. 26, 2021, 2:13 a.m. WILLIAM B LAWRENCE via Healeys, <<a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>> wrote:</p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal>The symptoms I’ve seen and experienced are that the OD will engage and function until the oil temp comes up and the viscosity drops off and will then fail. I suppose it depends on the degree of degradation of the o-rings.</p></div><p class=MsoNormal><img border=0 width=162 height=2 style='width:1.6875in;height:.0208in' id="Horizontal_x0020_Line_x0020_1" src="cid:image004.png@01D72249.CFDA0D90"></p><div id="gmail-m_5305121234551432854gmail-m_-7260173366705078485m_2913893478454826311divRplyFwdMsg"><p class=MsoNormal><b><span style='color:black'>From:</span></b><span style='color:black'> Healeys <<a href="mailto:healeys-bounces@autox.team.net">healeys-bounces@autox.team.net</a>> on behalf of Bob Spidell <<a href="mailto:bspidell@comcast.net">bspidell@comcast.net</a>><br><b>Sent:</b> Thursday, March 25, 2021 11:14 PM<br><b>To:</b> <a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a> <<a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>><br><b>Subject:</b> Re: [Healeys] overdrive problem</span> </p><div><p class=MsoNormal> </p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Sure, but wouldn't faulty O-rings prevent the OD from engaging in the first place? Just guessing, but wouldn't a deficient pump cause same symptoms?<br><br></p><div><p class=MsoNormal>On 3/25/2021 4:07 PM, WILLIAM B LAWRENCE via Healeys wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>Sorry, but the Laycock deNormanville overdrive is not supposed to kick down automatically. The most common fault that causes the OD to drop out is faulty o-rings on the accumulator sleeve. This won’t allow the OD to build full operating pressure.</p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Bill Lawrence</p></div><div><p class=MsoNormal>BN1 #554</p></div><p class=MsoNormal><img border=0 width=68 height=2 style='width:.7083in;height:.0208in' id="Horizontal_x0020_Line_x0020_2" src="cid:image007.png@01D72249.CFDA0D90"></p><div id="gmail-m_5305121234551432854gmail-m_-7260173366705078485m_2913893478454826311x_divRplyFwdMsg"><p class=MsoNormal><b><span style='color:black'>From:</span></b><span style='color:black'> Healeys <a href="mailto:healeys-bounces@autox.team.net"><healeys-bounces@autox.team.net></a> on behalf of Kees Oudesluijs via Healeys <a href="mailto:healeys@autox.team.net"><healeys@autox.team.net></a><br><b>Sent:</b> Tuesday, March 23, 2021 7:37 AM<br><b>To:</b> <a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a> <a href="mailto:healeys@autox.team.net"><healeys@autox.team.net></a><br><b>Subject:</b> Re: [Healeys] overdrive problem</span> </p><div><p class=MsoNormal> </p></div></div><div><div><p class=MsoNormal>That is the way it should be when accelerating hard, Kick down!!<br><br>Kees Oudesluijs<br><br><br>Op 23-3-2021 om 01:06 schreef healeymanjim via Healeys:<br>> friends BT7 had o/d quit. solenoid was bad so replaced it. now it will go into o/d but pop out when accelerating. any<br>> ideas what the cause is and the fix?</p></div></div></blockquote><p class=MsoNormal><o:p> </o:p></p></div></div></blockquote></div></blockquote><p class=MsoNormal><o:p> </o:p></p></div></blockquote></div></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><pre>_______________________________________________</pre><pre>Support Team.Net <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a></pre><pre>Suggested annual donation $12.75</pre><pre><o:p> </o:p></pre><pre>Archive: <a href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive">http://autox.team.net/archive</a></pre><pre><o:p> </o:p></pre><pre><a href="mailto:Healeys@autox.team.net">Healeys@autox.team.net</a></pre><pre><a href="http://autox.team.net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healeys</a></pre><pre><o:p> </o:p></pre><pre>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/bspidell@comcast.net">http://autox.team.net/mailman/options/healeys/bspidell@comcast.net</a></pre><pre><o:p> </o:p></pre></blockquote><p class=MsoNormal><o:p> </o:p></p></div></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:4.8pt'>_______________________________________________<br>Support Team.Net <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>Suggested annual donation $12.75<br><br>Archive: <a href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive">http://autox.team.net/archive</a><br><br><a href="mailto:Healeys@autox.team.net">Healeys@autox.team.net</a><br><a href="http://autox.team.net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healeys</a><br><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/roggrace@telus.net">http://autox.team.net/mailman/options/healeys/roggrace@telus.net</a></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>