ECM / Programming Change
Howdy,
I am new to the forum, I have been following this thread. I went to my local 4x4 shop yesterday, and was about to pull the trigger on the 4.56 swap. However, they brought up several questions that spooked me......
Do I need to do any programming change with the gear swap (they were worried about the ECM kicking the truck into limp mode) - I did not think so, but I wanted to hear from others that have done the change to a 2015.
Speedometer calibration - does it throw off your displayed speed (maintaining stock wheels)
I live in SC, so we have rollers for the day to day, and then decent pulls up to the smokey mountains. The 3.73 has caused the truck to lug significantly pulling a 6500# load.
Thanks all for the help / advice. Sorry for the first time post asking tons of questions!