Is there anyway to calibrate the speedo to accomadate bigger tires on my 1994 f-150 extended cab?

 

This site did a article on it a while back. The link is below.

<a href="https://www.ford-trucks.com/articles/december2001/speedorecal.php">https://www.ford-trucks.com/articles...peedorecal.php</a>

Good luck and Cheers!
Sucko

 

how about a re-calibration for the older ones?
say, an 88' perhaps?

 

You have to change the driven gear on the speedo cable. Costs $7 takes 10 minutes. Search the archives for the sizing info. It's been posted before.

 

Thank yall for the help.I was thinking on adding some 31'' bfg and was unsure if the speedo could be calibrated.Once again thanks.

 

FWIW:

I called the local ford dealership today, and they told me they have tables to calibrate the needed driven gear size for you based on your tire size and diff ratio. $8.95 for the driven gear. . . dirt cheap if it saves a fella a speeding ticket!

Traves

 

BTW:
thanks to StrangeRanger for the "inspiration" to go and check it out...

T.

 

After you replace the gear, if you have or can borrow one of those hand held GPS units, you can use it as you drive, to check to insure you change is accurate.
Those GPS units are accurate to within 1/2 a mile per hour, and read out in real time.