Yesterday driving on 95 whenever I went 70 and over the car would surge a little then I'd let off the gas and it'd be ok. One time it starting bucking a little when I let off the gas but that only happened once and today it was fine. No codes were set and I wasn't even in boost. I don't think its tranny related, I just did a complete rebuild a few months ago and everything that went in tranny was billet. It hasn't been slipping at all, shifts nice and hard like it has the past few months. Any ideas? TIA