71camaro

iTrader: (8)

I recently did a tranny swap from a 4l60e to a t-56. And everything is good except for the cruise control, traction control, airbag light is on, and the speedo doesnt work properly. When Im going like 45 it reads like 20. So I put my buddy's pcm in my car and the speedo worked correctly and the traction control worked. So i put the old pcm back in and got it tuned with a 6 speeds files. But speedo still reads wrong and the ASR still wont work. Do I need to get the pcm reflashed or what? thanks