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<div> <font size="3">I flat towed a TR6 50 miles. Within a year the transmission was making ominous noises of galled mainshaft bushings. But others have made reports of no issues.</font></div>
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<div><font size="3">Quick question: did your transmission have overdrive? I have a working theory that transmissions with overdrive survive much better because the moving drive shaft will rotate the planetary gear assembly which is partially submerged in oil. The rotating planetary gear assembly will distribute oil about the OD case and some, enough, finds its way into the main gearset lubricating the mainshaft bushings. Non-overdrive transmissions have no such feature and the bushings go dry.</font></div>
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<div><font size="3">I know nothing about the Toyota box but I suspect it is more like the non-OD Triumph unit.<br>
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<div style="clear:both"><font size="4">Dave </font><br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: Johnnie Donnelly <johnniedonnelly@gmail.com><br>
To: Sujit Roy <triumphstag@gmail.com><br>
Cc: Triumphs <triumphs@autox.team.net><br>
Sent: Tue, Jul 6, 2021 9:22 pm<br>
Subject: Re: [TR] Flat Towing a TR6<br>
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<div class="yiv0982776650gmail_default" style="font-size:small;">Many many moons ago, the oil pump shaft broke rendering the engine useless. Decided to get a tow dolly and pull it 500 miles to home. That was in 1972. The tranny still functioned perfectly 40 years later before being replaced by a HVDA toyota. So there's two issues here; is flat towing really a problem? and .... can a Toyota conversion be flat towed?</div>
<div class="yiv0982776650gmail_default" style="font-size:small;"><br>
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<div class="yiv0982776650gmail_default" style="font-size:small;">Johnnie</div>
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<div class="yiv0982776650gmail_quote">
<div dir="ltr" class="yiv0982776650gmail_attr">On Mon, Nov 23, 2020 at 9:46 PM Sujit Roy <<a rel="nofollow noopener noreferrer" ymailto="mailto:triumphstag@gmail.com" target="_blank" href="mailto:triumphstag@gmail.com">triumphstag@gmail.com</a>> wrote:<br>
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<blockquote class="yiv0982776650gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">
<div>That's a great demo. My son asked me how a gearbox worked and I told him why didnt he ask me a few months earlier. I had a Triumph Stag box apart and just pit back the top cover</div>
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<div class="yiv0982776650gmail_quote">
<div dir="ltr" class="yiv0982776650gmail_attr">On Mon, Nov 23, 2020, 11:12 AM <<a rel="nofollow noopener noreferrer" ymailto="mailto:jpaynepbr@cox.net" target="_blank" href="mailto:jpaynepbr@cox.net">jpaynepbr@cox.net</a>> wrote:<br>
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<blockquote class="yiv0982776650gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">
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<div class="yiv0982776650MsoNormal">That is really cool. Good show!<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
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<div class="yiv0982776650MsoNormal"><b>From:</b> Triumphs <<a rel="nofollow noopener noreferrer" ymailto="mailto:triumphs-bounces@autox.team.net" target="_blank" href="mailto:triumphs-bounces@autox.team.net">triumphs-bounces@autox.team.net</a>> <b>On Behalf Of </b>Dean<br>
<b>Sent:</b> Monday, November 23, 2020 10:44 AM<br>
<b>To:</b> Mark J Bradakis <<a rel="nofollow noopener noreferrer" ymailto="mailto:mark@bradakis.com" target="_blank" href="mailto:mark@bradakis.com">mark@bradakis.com</a>>; <a rel="nofollow noopener noreferrer" ymailto="mailto:triumphs@autox.team.net" target="_blank" href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a><br>
<b>Subject:</b> Re: [TR] Flat Towing a TR6<u></u><u></u></div>
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<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal">I built a cut away transmission to show people how a transmission works and always showed them how the oil level was below <u></u><u></u></div>
<div class="yiv0982776650MsoNormal">The main gears and if they don’t turn they don’t bring up the oil.<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal">Dean Tetterton<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><img style="width:8.2604in;min-height:5.5312in;" id="yiv0982776650gmail-m_-8006370898837237141m_-7073997423245416296Picture_x0020_3" width="793" height="531"><u></u><u></u></div>
<div class="yiv0982776650MsoNormal">The black line shows the oil level. By turning the output flange you can see gears sitting still and not pulling up the oil.<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><img style="width:8.2604in;min-height:5.5312in;" id="yiv0982776650gmail-m_-8006370898837237141m_-7073997423245416296Picture_x0020_4" width="793" height="531"><u></u><u></u></div>
<div class="yiv0982776650MsoNormal">By turning the knob on the clutch disc you can operate the gears.<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><img style="width:8.2604in;min-height:5.5312in;" id="yiv0982776650gmail-m_-8006370898837237141m_-7073997423245416296Picture_x0020_5" width="793" height="531"><u></u><u></u></div>
<div class="yiv0982776650MsoNormal">You can also shift all the gears while it is turning. <u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal">Sent from <a rel="nofollow noopener noreferrer" target="_blank" href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
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<div class="yiv0982776650MsoNormal"><b>From: </b><a rel="nofollow noopener noreferrer" ymailto="mailto:mark@bradakis.com" target="_blank" href="mailto:mark@bradakis.com">Mark J Bradakis</a><br>
<b>Sent: </b>Monday, November 23, 2020 11:40 AM<br>
<b>To: </b><a rel="nofollow noopener noreferrer" ymailto="mailto:triumphs@autox.team.net" target="_blank" href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a><br>
<b>Subject: </b>Re: [TR] Flat Towing a TR6<u></u><u></u></div>
</div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal">On 11/22/20 7:50 PM, dave wrote:<u></u><u></u></div>
<div class="yiv0982776650MsoNormal">> But if you are flat towing the car, the transmission gears are moving.<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal">Actually the gears are NOT moving. Just the mainshaft is turning, in <u></u><u></u></div>
<div class="yiv0982776650MsoNormal">unlubricated bearings and syncro bushings.<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal">mjb.<u></u><u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
<div class="yiv0982776650MsoNormal"><u></u> <u></u></div>
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