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Speedometer incorrect

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Old Aug 3, 2020 | 04:43 PM
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Ryanalofs
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Originally Posted by scottscott
You need fewer teeth on the driven gear to speed up the speedometer. Your error is roughly 20%. You need a gear with 20% fewer teeth. You would need a 14 tooth gear to get it close. A 14 tooth gear doesn't exist, so you have to change the drive gear in the transmission.
Well thats probably not going to happen. Lol. Ill just have to deal with it for a while. Just from looking at it, ill have to drop the transmission and pull the tail shaft housing off to get to it. I think... Unless there's a simpler way to change it out.
 
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Old Aug 3, 2020 | 07:12 PM
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You might find this post from earlier in the year helpful.

https://www.ford-trucks.com/forums/1...procedure.html
 
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Old Aug 3, 2020 | 08:38 PM
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Originally Posted by caravaggio2000
You might find this post from earlier in the year helpful.

https://www.ford-trucks.com/forums/1...procedure.html
Just read throug that post. What an eye opener. Thank you for showing me that. Now I know i can replace the drive gear. But I just don't know how to get the right drive/driven gear combination to my specific truck.
 
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