1965 speedometer reading too fast

[seeker2736]

I have noticed that my speedometer reads about ten miles per hour to fast.
Is there anyway to adjusted this to the correct reading. example the other day
I passed one of those speed output signs it said I was going 38 but speedometer showed 45

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[ak7an]

While there is no adjustment, you could change the speedometer drive gear. Larry's Tbird sells these, look here, https://www.larrystbird.com/product...bird-1958-1966-ford-thunderbird-transmission/ . It might take a little bit of calculating which one would be correct. Rear gear ratio, and tire size all come into play as to which one would be correct.
Hope this helps
Ed

 

[seeker2736]

While there is no adjustment, you could change the speedometer drive gear. Larry's Tbird sells these, look here, https://www.larrystbird.com/product...bird-1958-1966-ford-thunderbird-transmission/ . It might take a little bit of calculating which one would be correct. Rear gear ratio, and tire size all come into play as to which one would be correct.
Hope this helps
Ed

thanks for the information