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Triumph Torque    Cars    Spitfire/GT6  ›  Speedo and rev counter
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June 17, 2012, 6:46pm Report to Moderator

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Hi guys
I have a triumph gt6 and my speedo and rev counter are not working. The ignition light works and the indicator light too so they both have power but neither dial goes round when in motion/accelerator down.

Before I buy a new pair does this sound like it is broken or loose wire and repairable or something else? I have fitted a new alternator but the rev counter does not work still thank you.

Owner of Triumph GT6 MKIII 1972, K reg. Rolling restoration, previously owned a spitfire 1500
Welding done Oct 2011
MOT done march 2012
New gear box May 2012
electrics ongoing.......
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Velocita Rosso
June 17, 2012, 6:50pm Report to Moderator

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Speedo works form the gear box
Could be the drive cable/the angle drive of the input on rear may have rounded off and  not square,allowing cable to drive
Put an quivalent sized bit in to the orifice at the back and use a cordless drill on slow speed to test if gauge needle works
The rev counter works on a feed from the coil and earth
Try slave wires to the reve counter whilst engine is  running, in case there is a broken wire somewhere  

Il Capo

MK3 Spitfire, Red

Ten Countries,finisher in `09 ,`11 and `13  and 15 in a fashion
Ten Countries 2015 Ferry Organiser with Mike Helm/Andy Flexney
HCR 09/10/11/13 Finisher , 15 ..engine died
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Int Auto Ecosse `10 and `11, `12 (Good result!)
Club Auto solo `10,`11,`12 (Spitfire 3rd in Class but not driven by me)`13 no gearbox,`14 (useless)
Raiders Triumph `12 inaugural ,still dizzy  Raiders Northern `15 ..sunny!
Track Days, Cadwell/ Donington 2009 10CR at Nurburgring
Plus other speed,tyre wearing addictions , which includes buying new tyres on the 10CR in The Netherlands
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June 17, 2012, 8:31pm Report to Moderator

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Rev counter on a GT6 is a mechanical one, so driven by a cable that is connected to the distributor. So check both cables if they are connected to gearbox/distributor and gauges.  

1969 2.5 PI (It's alive!!!! )
1971 GT6 mk3 (still going strong)
1976 Mini 1000 (needs a carb rebuild)
1991 Mini Cooper S (my girlfriends car)
2001 Audi A4 1.8T Avant (daily cruizer)

Survivor of 10CR05, LCC06, RBRR06, 10CR07, LCC09, 10CR11' 10CR13 and many many Dutch nightrallies. http://dutchtriumph.blogspot.com/

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June 17, 2012, 9:04pm Report to Moderator

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i actually have a TR6 gearbox, does that make things more complicated?

Owner of Triumph GT6 MKIII 1972, K reg. Rolling restoration, previously owned a spitfire 1500
Welding done Oct 2011
MOT done march 2012
New gear box May 2012
electrics ongoing.......
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Triumph Torque    Cars    Spitfire/GT6  ›  Speedo and rev counter

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