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By texasmark1 - 16 Years Ago
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suggestions appreciated... sure, they're to be found on ebay and from catalog sources like Councors... any suggestions from experience? thanks, Mark for a 57, 3 spd, non-overdrive, by the way...
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By DANIEL TINDER - 16 Years Ago
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Mark,
When you DO find a source for speedo gears, be aware the subject can get quite complicated. Aside from the myriad of teeth #s/take-off styles/material compositions/NOS vs. repro/differential ratios/etc.,etc., if you throw in a change to radial tires & the goal of achieving precise speedometer calibration, some serious math may be inevitable.
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By pegleg - 16 Years Ago
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NAPA, and Ford!
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By Unibodyguy - 16 Years Ago
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I've never heard of NAPA even having these, I'll sure give it a try. Michael
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By texasmark1 - 16 Years Ago
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ditto... searching online at NAPA and Advance Auto... nuttin' honey... guess its back to a trusted source... Concours Parts... calling Nevada... come in, Nevada! Mark
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By MoonShadow - 16 Years Ago
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Aren't the speedo gears the same from 57 on up into the 70's? I think mine is a mustang piece? For some reason I couldn't get a definitive answer to the same question. Ended up taking my old gear to the parts store. (I use a 57 up cable with my AOD) Chuck in NH
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By pegleg - 16 Years Ago
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Evidently dealers in different areas carry different parts. I bought a couple from concours, and then was told by a buddy at the local NAPA store that he could get them also. I'll have to ask him again and see if I can find the manufacturer. Forget Advance and Autozone,"what year is your car sir?"
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By Ted - 16 Years Ago
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MoonShadow (11/29/2009)
Aren't the speedo gears the same from 57 on up into the 70's?The Ford speedo gears for the transmission end of the cable are of the same basic design from 1957 thru the mid Nineties. You just need to know the number of teeth needed and if that particular number of teeth is compatible with the spiral gear on the transmission tail shaft.
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By texasmark1 - 16 Years Ago
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"compatible... we don't need no stinkin' compatible...!" oh, wait... that's badges... thanks for the input; guess I'll take mine to the NAPA store with the oldest-looking counter help and see what happens! thanks,Mark
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By Unibodyguy - 16 Years Ago
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Somewhere I read several years ago, that each tooth on the cable end of the gear is supposed to be 5mph?? I think thats the way it was. I know it wasn't the driven gear in the trans. itself.
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By MoonShadow - 16 Years Ago
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If you have the original gear they may be able to determine the teeth on the other gear that is inside the tailshaft. They have to match in numbers or the gear will just tear up. I don't know how many different ratios there are but I'm sure someone here does. Chuck in NH
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By Hoosier Hurricane - 16 Years Ago
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Mark: Also be aware that there are right and left helix on the gears. Depends on whether the original application had the speedo cable aimed above or below the outplut shaft. My grandson pointed out to me the other day that his NPD Mustang catalog lists gears by right or left and number of teeth.
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By marvh - 16 Years Ago
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Here is a link to a site which has gear type, colour and Ford part numbers.
http://www.fabulous50sford.com/mr/mr-7.html
marv
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