I just Got a 2012 Malibu with 178xxx on it, no idea what has previously been done to it, but today i noticed When i first Start it and go to leave, it kinda hesitated shifting from like 1st to 2nd and after driving for about 20mins, going about 35-40mph the rpms will jump and then drop again. I really Don’t want to dump a bunch of money into this, please tell me this will be an easy cheap fix!