<div dir="ltr"><div class="gmail_default" style="font-size:small">Thanks John, good advice.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">I thought I'd take the simplest (and cheapest) approach first; clean the cable. If that doesn't work, then certainly, it means pulling the speedo and off to the instrument shop. </div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">The calibration of the speedo was changed a few years ago based on the tires, so I'm thinking that's it's really the cable at issue. But, your comment about gunk inside the head unit causing the bounce opens another possibility. </div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Thx, Johnnie</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Oct 25, 2017 at 4:42 AM, John Macartney <span dir="ltr"><<a href="mailto:john.macartney@ukpips.org.uk" target="_blank">john.macartney@ukpips.org.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-GB" link="#0563C1" vlink="#954F72"><div class="m_-1703595018786807618WordSection1"><p class="MsoNormal"><span>Sounds like a combination of two probs:<u></u><u></u></span></p><p class="MsoNormal"><span><u></u> <u></u></span></p><ol style="margin-top:0cm" start="1" type="1"><li class="m_-1703595018786807618MsoListParagraph" style="margin-left:0cm"><span>Dirty cable in a dirty outer sheath. I’d wash the inner drive cable in a degreaser, then when dry, pull the cable several times across the palm of your hand into which there is a small puddle of lightweight machine oil – 3 in 1 is ideal. Then refit with a new outer sheath or the original one, as long as it’s very clean inside. Of course, you could fit a new inner cable and outer cable sheath but lube the cable as suggested before fitting.<u></u><u></u></span></li><li class="m_-1703595018786807618MsoListParagraph" style="margin-left:0cm"><span>Needle bounce is often caused by dirt and old lube contaminating the speedo head. May be sensible to send off the whole speedo assembly for professional cleaning and possible repair<u></u><u></u></span></li><li class="m_-1703595018786807618MsoListParagraph" style="margin-left:0cm"><span>Optimistic/pessimistic speedo reading. Are your tyres likely to have a different rolling radius to the original spec? Is the gearbox speedo drive damaged or even a non-original item with different gearing?<u></u><u></u></span></li></ol><p class="MsoNormal"><span><u></u> <u></u></span></p><p class="MsoNormal"><span>Jonmac<u></u><u></u></span></p><p class="MsoNormal"><span><u></u> <u></u></span></p><p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Triumphs [mailto:<a href="mailto:triumphs-bounces@autox.team.net" target="_blank">triumphs-bounces@<wbr>autox.team.net</a>] <b>On Behalf Of </b>Johnnie Donnelly<br><b>Sent:</b> 25 October 2017 03:45<br><b>To:</b> Triumphs <<a href="mailto:triumphs@autox.team.net" target="_blank">triumphs@autox.team.net</a>><br><b>Subject:</b> [TR] Speedo Bouncing<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal"><span style="font-size:12.0pt">I know this has been discussed before, but thought I'd ask again.<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt">My speedo needle bounces, or shows 80 when I'm doing 60. So, before going to the extremes of pulling the speedo for repair I thought I'd R&R the cable. <u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt">What's the best way to do this? Cleaning process? Which grease? Does adding graphite help?<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt">Johnnie <u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt">Wondering how fast I'm going in my '67 TR4A<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p></div></div></div><div id="m_-1703595018786807618DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
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