Stewy
January 31st, 2009, 03:05 AM
I recently read the ECM calibration data from a 2008 4.8L (LY2??) and the TCM calibration data. The first thing I noticed was the gear ratios did not match. The ECM displays 3.42 and a tire size of 335" while the TCM displays 3.73 and tire size of 6". this information is obvoisly incorrect but a second read displayed the same. Is it possible other data is corupted? What am I over looking??
I have attached both stock tunes, any help is greatly appreciated
I have attached both stock tunes, any help is greatly appreciated