Thatguy
Full Access Member
you can recalibrate your speedo in a couple minutes.just need to either do the math to fing the number you need or somebody here can give it to you.i dont have my truck here so i cant give you the code mine needed
http://www.ford-trucks.com/article/...EDOMETER_ON_9296_FORD_FSERIES_AND_BRONCO.html
I still need to figure out the gears. the 5% difference in tire size does not account for 10% error in the spedometer (if there is one). Speedo could be going out, somebody could have put 4.33 gears in it, I still have not verified that it has a sterling (to tell the truth it looks like a 14bolt, and those came with 4.56). but now that I have a pic of what a sterling looks like I can verify the axle. on my way home next week I will plug in my GPS and get an accurate speed to compare to the rpm and go from there.
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