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'65 chevy lover

05-24-2018 12:22 AM

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?

PGSigns

05-24-2018 06:43 AM

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/

'65 chevy lover

05-24-2018 11:35 PM

Re: Speedometer not accurate

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

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