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Old 05-24-2018, 12:22 AM   #1
'65 chevy lover
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Speedometer not accurate

On my truck build(65 C10), I replaced the 2 speed powerglide transmission with a TH400 and, the speedometer is way off. What do I need to make it accurate or, can it even be modified to work with the TH400?
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Old 05-24-2018, 06:43 AM   #2
PGSigns
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Re: Speedometer not accurate

What get changed is in the trans. They all have gear sets in them that are used to calibrate the speedometer. Here is a link to one of the online calculators to help get you working.
Jimmy
http://www.tciauto.com/tc/speedometer-gear-calculator/
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Old 05-24-2018, 11:35 PM   #3
'65 chevy lover
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Re: Speedometer not accurate

Thanks for the link. I'll check it out.
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