Drivetrain Gear Change, Speed Sensor ?

Discussion in '2010 - 2014 Specific Tech' started by V10KLZZ71S, Sep 12, 2012.

  1. Thinking about a 4.10 swap on my 2013, I have 3.73's now. My question is where or how does it compute speed? I have been reading about ecu recalibrate for gear swaps. Can someone elaborate?
  2. If you have an SCT tuner, then you can go in and change the ratio for the correct gears. If not, depending on the shop that installs the gears, they should have some sort of handheld to adjust the ratio for you. I know our ford dealer in town will re flash the computer for the correct gear size.
    V10KLZZ71S likes this.
  3. SCT tuner or the dealer if the gear ratio is a factory option.