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Rjuhar

Telling apart speedo clusters

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Rjuhar

How do you tell apart phase 1 and phase 2 speedo clusters? To the eye they look the same (same graphics) but AFAIK they are different in the "brain" section of a rev counter. Thanks

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welshpug

early phase1 look a little different, later ones look mostly identical bar the addition of abs and catalytic converter lights and eml later on.

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petert

The rev counter is the same. They all pick up the -ve side of the coil, including Motronic versions, which also have a K diagnostic light.

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Henry Yorke

I swapped a Speedo cluster once and it changed the readings for the better! When I fitted the MI gearbox with 1.9 FD it read 20mph less at 70mph. I then built up a set of Euro spec clocks on a different cluster and set the mileage the same and when I fitted them, the speedo read correctly when compared with my TomTom sat nav at the time. I thought I would have to change the worm and drive on the driveshaft to correct the speed but obviously not. 

 

I can’t  quite explain it but that was my experience and I’m not complaining!!

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Anthony

I have seen speedo clusters fail in a manner where they appear to work but are way off in terms of accuracy, so I'm hazarding a guess that's what you had.

 

Providing that you keep with a matching pair of drive gears, the speedo generally isn't that far out and tends to over-read rather than under-read.  It's mixing the cogs up that causes problems, but clearly that would have equally been the case with the replacement speedo cluster.

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