Hey y'all, I had a new transmission put in and it drove fine for about a day, until when I got on it and it started jerking violently once I hit around 5k rpm. Now, it doesn't start jerking and the car drives fine until I hit those higher RPMs. But once it starts jerking it does it at all RPMs until I shut my car off and then it don't do it again until I hit around that 5k rpm range again. If you know what could be wrong and how to fix it PLEASE LET ME KNOW. Any help is very much appreciated