I have recently swapped to 35” tores and 4:10 gears. Previously I had 285/75r16 and 3:55 gears. I have read a couple forums on how to recalibrate the speedo, but will this affect my shift points at all? I did a comparison calculator and it seems like stock tires with 3:55 and 35 with 4.10 are pretty close to equal.
Any help or advice is helpful. Does anyone know what code I need for the 35s?
97 F250HD XLT. 4x4 7.3 CCSB, 140,000 miles, 33" tires, 355 limited slip rear axle, 4" turbo back and 6637 Intake, glow shift gauges, PHP 6 position chip.
I don't know what's next.