I have a 99 cummins and swapped the motor to a 01. I swapped ECM and PCM and still have a dead tac and no power. I read about tone rings and having the computers reflashed for an auto trans. and changing valve cover solenoids...im lost truck ran fine before and now it wont crank hardly and doesn't like to go fast when I put it to floor wont down shift just acts like its in limp mode. any help would be great I used my 99 wiring harness. and 99 vp 44. what needs to be done to make truck right again?