program for f350

[H20 Toie]

I finally got my 05 f350 with diesel, i have 37" tires so i need to get a program to fix the speedometer, what is the best one available, i don't need to boost the horsepower (not yet anyhow) just fix the speedometer

[slingingsmoke]

take it to power ford Valencia. Ask for Jim, He's the diesel tech. Ford can re-program tires up to 35". It will come very close, withing 1-2 mph because your 37's dont actually measure 37 inches in dia.
Anyways, he should be able to help out.
Also, go to your tire manufacurers website and see how many revs per mile your tire turns. This will help out with the programming.
JON.