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Speedo Gear question

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Old May 20, 2006 | 12:06 PM
  #1  
bbbitter's Avatar
bbbitter
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Default Speedo Gear question

How do I get the speedo gear out of the transmission? I have a Ford Toploader 4-speed. I also need a calculator for gear teeth when i replace it. thanks
Old May 20, 2006 | 12:10 PM
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Default RE: Speedo Gear question

This month's Mustang Monthly has good article about speedo geer teeth
Old May 20, 2006 | 02:54 PM
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Default RE: Speedo Gear question

If you have a NPD catolog the formala for the speedo gear is in there next to their listing of gears.
Old May 20, 2006 | 03:19 PM
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Default RE: Speedo Gear question

(# of drive gear teeth)x(Axle ratio)x(Tire revolutions per mile)
1000

Just plug in the number of teeth on the drive gear inside the transmission (6, 7 ,8) multiplied by the axle ratio (3.00, 3.50, etc.) and multiplied by the tire revolutions per mile, then divide all that by 1000. The result, such as 19.27 is the approximate number of driven gear teeth required for proper speedo readings. Tire revolutions per mile can be found in the manufacturers specifications for a given tire style and size.

This is from the latest NPD catalog. pg 113, top right hand corner of page.
Old May 20, 2006 | 06:06 PM
  #5  
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Default RE: Speedo Gear question

so how do i get it out of the tranny?
Old May 20, 2006 | 07:47 PM
  #6  
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Default RE: Speedo Gear question

On my 66 C-4 all i did was pull on the speedo cable and it came out.
Old May 20, 2006 | 10:35 PM
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Default RE: Speedo Gear question


ORIGINAL: bbbitter

so how do i get it out of the tranny?
Have you tried yet? It's incredibly easy.....
Old May 21, 2006 | 03:48 PM
  #8  
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Default RE: Speedo Gear question

Yeah it doesn't just pull out. I have tried for many hours in fact and it will not come out.
Old May 21, 2006 | 04:00 PM
  #9  
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Default RE: Speedo Gear question

did you remove the retaining clip and bolt
Old May 21, 2006 | 06:29 PM
  #10  
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Default RE: Speedo Gear question

ORIGINAL: mustanglover66

did you remove the retaining clip and bolt
I was thinking the same thing. There is a small bolt that holds the retaining clip in. Take that out, the just pull it out.
See if this info will help you regarding the number of teeth. http://www.z31.com/speedo.shtml



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