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 Speedo 
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Joined: Fri Jul 10, 2009 9:04 am
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Location: TEXAS
Post Speedo
Anyone know the calculation to figure out what gears I need for my Speedo?
TH400 transmission.
I need to count the teeth on the existing Speedo Gear. I think a drive gear is cheaper than buying a gear puller to pull the old gear off of the old transmission and even then I would not know if the speedo would be accurate anyway, since I have never had this transmission in this truck before.

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David


Tue Aug 04, 2009 10:12 pm
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http://www.tciauto.com/Products/TechInf ... _gears.asp

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:5150:


Tue Aug 04, 2009 10:22 pm
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Thanks, that works pretty good

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Tue Aug 04, 2009 10:35 pm
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Good info on that linky B :punk:

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Sat Aug 22, 2009 1:47 pm
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Post Re: Speedo
Thanks for the link 5150! :punk: That link needs to be made into a "tech sticky"!!!

Larry

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Sat Jan 02, 2010 2:49 pm
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Post Re: Speedo
http://www.73-87.com/convers_calcus/calcus.htm

This page on 73-87 has several links to auto calculations


Sat Jan 02, 2010 9:35 pm
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