Originally Posted by
coreymck
So the used one is a pcm pct2 I have a pct3 I heard that the pct1 is the best one for shift patterns but really don't know what the differences are between em all
I'm not sure either. Your tuner can probably give you more details about the differences between the various calibrations. There are over 400 different PCM calibrations that I am aware of....
That is why I was suggesting that you have your dealer or tuner reflash your existing PCM. It's likely that your chip was programmed for your particular PCM code so it's worth keeping things the same in my opinion....