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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old Oct 26, 2007 | 12:29 AM
  #1  
bobfromktown's Avatar
bobfromktown
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From: College Station
Question.

So I did all teh calculations and I am almost positive that I got it correct with 35x12.50xR15 BFG AllTerrains my correct Cal number is said to be 8.09 so I grounded the switch and changed it from 825 to 809 and then turned the truck off and then I did it again just to insure myself that the number saved if for some odd reason it did not. Now I am just wondering if that is actually the correct thing to do? Thanks.
 
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Old Oct 26, 2007 | 08:38 AM
  #2  
Skandocious's Avatar
Skandocious
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From: Davis & Newcastle, CA
I'm assuming that you're talking about reprogramming the speedo? I don't remember the procedure exactly but be careful about how many times you are doing it, I believe you only get 5 shots before it locks you out for good.
 
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