No I haven,t figured it out yet, I have 315/70/17 tires on the truck and I set the revs on the programmer to 587 but it is not changing it to the proper speed

Part# U7153, Revision 9r03, 2001 Ford F150 4.6L

Here is the problem, I have had this programmer for four years and it has worked great till I updated to the 9r03 revision. Now the speedometer is showing about ten miles an hour to fast with the new revision what should I do? I can`t get the July-24 ...