just had catilac converter changed it was pluged up now it is shifting hard help on 2007 Pontiac G6

is it a sensor

Asked by for the 2007 Pontiac G6
2 answers
Could it be due to more power from the engine, now that it can exhale?
IT COULD TAKE AWHILE FOR MODULES TO READ THE NEW ARE FLOW,IF THE CATT WAS PLUGGED FOR A LONG TIME