avivalasvegas Posted January 10, 2022 Report Share Posted January 10, 2022 Existing unit has Parkinson's at nearly all speeds, so I'll need one in the car while mine is rebuilt. Preferably NOS or reconditioned. Please DM me if you have one lying around. Thanks in advance! Link to comment Share on other sites More sharing options...
Josef Posted January 10, 2022 Report Share Posted January 10, 2022 What’s the TPM value? It’ll be a 3 or 4 digit number probably under the RHS of the trip counter. That’s all you need to match (and the speedo cable connection). I might have something that would do as a temp replacement, though wouldn’t be a GT6 version. Would be just a used one, I am able to check if they run at spec though. Also have you checked the speedo cable? That can also so give the same symptoms (and is cheaper than a speedo refurb!) Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 10, 2022 Report Share Posted January 10, 2022 twitchy needles are generally a cable problem getting wind up and released have you tried some lube of the cable not a lot , there is a special grease that wont transpose up the cable but we wont go there it smells awful graphite powder is often used but doesnt work well a smear of thick grease not oil will work ( contrary to many beliefs ) Pete 1 Link to comment Share on other sites More sharing options...
Steve P Posted January 10, 2022 Report Share Posted January 10, 2022 My Herald speedo used to wave about all over the place, until the O/D angle drive died and chewed the cable, a new cable and angle drive and it`s rock solid smooth at all speeds now, i was surprised. Steve Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 10, 2022 Report Share Posted January 10, 2022 hope you fitted the 7/16 washer in the angle drive/to gearbox drive or the new one will fail even rimmers say no washer no warranty Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 10, 2022 Report Share Posted January 10, 2022 On which side? Gearbox or cable side? Many waggling speedo needles can be fixed by just pushing the inner cable more firmly into the gauge; disconnect at the gearbox end and push it up / in. Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 10, 2022 Report Share Posted January 10, 2022 colin the washer is only if you have an angle drive normally needed on a overdrive there is a BL tech note about the drive being pre loaded hence early failures the washer fits between the angle drive and the gearbox pinion drive to space it a little there is a part number but any 7/16 dia washer will work Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 10, 2022 Report Share Posted January 10, 2022 1 hour ago, Pete Lewis said: colin the washer is only if you have an angle drive normally needed on a overdrive there is a BL tech note about the drive being pre loaded hence early failures the washer fits between the angle drive and the gearbox pinion drive to space it a little there is a part number but any 7/16 dia washer will work Pete Yes, but I'm just about to fit one to the Herald... so thought I'd better check. Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 11, 2022 Report Share Posted January 11, 2022 Product Description Note: Washer 538532 required to be replaced at same time to validate warranty. copied from rimmers but any washer steel copper fibre will do the job of around 7/16" dia. Pete Link to comment Share on other sites More sharing options...
avivalasvegas Posted January 27, 2022 Author Report Share Posted January 27, 2022 Back on topic - still looking for a NOS speedo ideally. Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 27, 2022 Report Share Posted January 27, 2022 have you tried to lube the cable ? and run the speedo off a battery drill if the needles steady its the cable not the head Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 27, 2022 Report Share Posted January 27, 2022 https://www.ebay.co.uk/itm/114746556344?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338353466&toolid=20006%26customid%3Ds%3AGS%3Bgc%3AEAIaIQobChMI7ITOyNjS9QIVGurtCh0QNwwbEAQYBSABEgJj_vD_BwE%3Bpt%3A1%3Bchoc%3A2&customid=s%3AGS%3Bgc%3AEAIaIQobChMI7ITOyNjS9QIVGurtCh0QNwwbEAQYBSABEgJj_vD_BwE%3Bpt%3A1%3Bchoc%3A1&gclid=EAIaIQobChMI7ITOyNjS9QIVGurtCh0QNwwbEAQYBSABEgJj_vD_BwE I can oblige with a MK1... However there are companies who will refurbish and recalibrate yours if you can't find another; I presume that's where your original has gone?. https://thegaugeshop.com https://speedycables.com/instruments/gauge-repairs-conversions/ Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 28, 2022 Report Share Posted January 28, 2022 sorry to repeat but wavy needles are nearly always cable drives not the instrument would hate you pay a for a refurb and it remains the same and we were involved with testing speedos and tachographs for 25 years this is not just a pub talk idea please do check it out, let us know Pete Link to comment Share on other sites More sharing options...
Gully Posted January 28, 2022 Report Share Posted January 28, 2022 To reinforce Pete's point, my wavy speedometer was sorted by a new cable. That was until oil migrated from the rebuilt gearbox up the new cable and into the speedometer, at which point it became totally erratic and went off to Speedy Cables for a clean up! Gully Link to comment Share on other sites More sharing options...
avivalasvegas Posted January 28, 2022 Author Report Share Posted January 28, 2022 On 27/01/2022 at 19:15, Pete Lewis said: have you tried to lube the cable ? and run the speedo off a battery drill if the needles steady its the cable not the head Pete Yes to the lube and yes to the test. It's not the cable, 8 hours ago, Pete Lewis said: sorry to repeat but wavy needles are nearly always cable drives not the instrument would hate you pay a for a refurb and it remains the same and we were involved with testing speedos and tachographs for 25 years this is not just a pub talk idea please do check it out, let us know Pete Not to doubt your invaluable experience, given the age of the instrument/ drive, wouldn't it make sense to send it all in for refurbishment as Colin suggests? Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 28, 2022 Report Share Posted January 28, 2022 pleased you have eliminated the drive , yes speedy cables have been around for years Pete 1 Link to comment Share on other sites More sharing options...
DanMi Posted January 29, 2022 Report Share Posted January 29, 2022 I would also check the seal in the speedo drive bearing in the OD unit. Mine leaked and that caused erratic speedos due to the oil going up the cable and into the head. Stopped the leak and had the speedo sorted and all good since. I had my head unit done by Scott Mitchell (Classic engineering If I recall) 1 Link to comment Share on other sites More sharing options...
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