1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

What's up with my speedo? Vid....

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Old 12-01-11, 07:26 AM
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What's up with my speedo? Vid....

http://i72.photobucket.com/albums/i2...a/c7d77e46.mp4
Old 12-01-11, 07:37 AM
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link isnt working, whats it doing
Old 12-01-11, 08:19 AM
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You sure you aren't just pushing like 600HP or have a CVT?

It would appear that something in it is broken... if you're lucky it's just the speedo cable (runs from the trans to the speedo.) If you aren't, it's the internals, not much you can do (for a reasonable price anyway) about that.
Old 12-01-11, 11:05 AM
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cant i just replace it with another cluster? it sounds like its broken in tha back. gues i just need to take it apart.
Old 12-01-11, 01:41 PM
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If it turns out that the gauge is busted it is possible to replace the speedo gauge with another working one, and not have to replace the entire cluster. I did it not to long as my speedo was doing the same thing yours is. Or you can just get a working cluster from another rx7. Theres Just a few bolts and screws holding the cluster in.
Old 12-03-11, 05:09 AM
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in only happenes in the cold. once the day warms up its fine...
Old 12-03-11, 10:24 AM
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That's a misleading thread title.....
Old 12-04-11, 09:07 PM
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Originally Posted by Touring
in only happenes in the cold. once the day warms up its fine...
The speedometer is dead, find another other one that works and replace the one you have. By the way, this is typical - speedo's tend to start failing in cold weather. Once this kind of failure starts it damages the return spring and messes up the calibration.
Old 12-05-11, 12:58 PM
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thank you. i couldnt find one on the bay.... still looking
Old 12-07-11, 06:25 PM
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buh...

just mark on your tach what certain speeds are in the gears you normally cruise them in. my old car did this, turns out 55mph is 3k on the tach, and 45 was 2.5k, 65 was 3.5k, by logical deduction every 10mph was attained very 500rpm's
Old 12-08-11, 05:43 AM
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Originally Posted by Take-7
just mark on your tach what certain speeds are in the gears you normally cruise them in. my old car did this, turns out 55mph is 3k on the tach, and 45 was 2.5k, 65 was 3.5k, by logical deduction every 10mph was attained very 500rpm's
it makes this horrible noise that i can tell is coming from the back like something is just spinning back there...... hasent done it in a while so i hope it stays that way..
Old 12-08-11, 11:47 PM
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speedo cable. my crx did this, i replaced it and fixed the issue.
Old 12-08-11, 11:57 PM
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Not sure its the speedo. Takes just a couple minutes to check cable and gear from underneath. That noise doesnt sound like a speedometer related issue either..
Old 12-09-11, 01:26 AM
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damn. i was kinda hoping you had the same speedo problem i do.
Old 12-09-11, 03:53 AM
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Originally Posted by Take-7
speedo cable. my crx did this, i replaced it and fixed the issue.
Originally Posted by twinkletoes
Not sure its the speedo. Takes just a couple minutes to check cable and gear from underneath. That noise doesnt sound like a speedometer related issue either..
thanks guys ill check it out. but what am i exactly checking for? cracks in the line?
Old 12-09-11, 05:38 AM
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Make sure if you take the speedo gear out to check it that you jack the car up from rear. This way no gear oil will spill. Atleast it shouldnt spill unless overfilled. One 10mm bolt holds speedo gear in. Cable is screwed onto it just handtight.

I doubt it's a broken cable. Unless its not in the back of the guage all the way it wouldn't register speed on the guage if it was broke. Issue is guage or gear. Probably not gear either, but a simple quick check to knock it off the list of possibilities.
Old 12-15-11, 10:37 PM
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not sure if the same as an s13 but I replaced the speed sensor gear thing that connects to the tranny, was going wacko.
Old 12-16-11, 04:39 AM
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Originally Posted by 1ZlowZ
not sure if the same as an s13 but I replaced the speed sensor gear thing that connects to the tranny, was going wacko.
But we're you hearing a noise coming from cluster?
Old 12-16-11, 04:47 AM
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But it registers gear fine when it's warm out. Them al of a sudden ill Hear a rattling in the back of the cluster and then I know it's about to go crazy. I'll check it this weekend.
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