I am looking for some folks that have done a 2jzgte swap in their sc300 and stayed with the automatic tt trans. Could you tell me if you went with the supra tt rear diff or something else. I am just trying to figure out what your cruising rpm is when you are on the highway at 80mph. I am currently running the 3.92 rear diff from an sc400 and I am a little over 3k rpm's at 80.