car is shifting real hard on 2007 Pontiac G6

had cat. converter changed now shifting hard could it be sensor or what

by in Hudson, OH on August 27, 2013
1 answer
ANSWER by , August 28, 2013
DO YOU HAVE ANY TRANS CODES. MOST LIKELY CATT WILL NOT CAUSE THIS ISSUE UNLESS THEY LEFT SOMETHING UNPLUGGED. RETURN AND HAVE THEM INSP FOR YOU