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. SCT tuner or the dealer if the gear ratio is a factory option.