Hey guys got a 2008 Silverado 4x4 (doner truck) condensed into a 1953 Chevy. Running all the stock modules including trans controller, ebcm and stock cluster. All tires are the same size and the gear ratio is the same in front and rear. Problem I'm having is if I adjust the ppm to correct the speedo it only changes the rear output speed not the fronts (running front abs sensors) So not only does it trip codes in the ebcm there seems to be no way to adjust the fronts for speed (which they are reading to fast cause of smaller tires)... Am I missing something? Surly you 4x4 guys out there that run bigger tires adjust the speedo without having this problem. I can hook up my scanner and change the ppm and only the rear speed sensor changes. I will attach my tune file.