First of all Merry Christmas to all, I have a problem and I hope I can help. I have a 2007 FX4 with 315/70R17 tires, the problem is that, even though I have rescheduled several times, the transmission has a certain speed hit, especially in first gear change to second, or vice versa. My mechanic and specialized workshops tell me that Ford is about the size of the tires. I can do? . The beat is annoying and constant. I have a DIABLOSPORT PREDATOR.

 

Did you reprogram the size of tires . I had Predetor with my 05 and reprogrammed size and should help. If youhave all ready , I dont know what to say,