The Ford Barn - speedo gear

The Ford Barn (https://www.fordbarn.com/forum/index.php)

- Model A (1928-31) (https://www.fordbarn.com/forum/forumdisplay.php?f=3)

- - speedo gear (https://www.fordbarn.com/forum/showthread.php?t=258443)

xmarine

01-30-2019 10:03 AM

speedo gear

Speedo reads about 12mph higher then GPS so my question is simply would I change speedo gear to more teeth or less teeth

katy	01-30-2019 10:17 AM

Re: speedo gear

More.

xmarine

01-30-2019 12:02 PM

Re: speedo gear

Thank you

Kurt in NJ

01-30-2019 01:13 PM

Re: speedo gear

How is the odometer-- if that reads correctly the problem is in the speedometer, not the gearing la

GRutter

01-30-2019 10:59 PM

Re: speedo gear

If you let us know your wheel size and rear-end ratio we can tell you what your speedometer gear "should be". Then if it doesn't read correctly the problem would be in the speedo not the gearing.
For example, a 30-31 with 19" wheels and 3.78 Rear (Standard) would use an 18 tooth driven gear in the speedo turtle

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