Billy - I had the same issue with a 1-pc driveshaft that I had purchased from Excessive engineering in my 2jzge Cressida. They insisted over and over again it wasn't the problem, however, a local driveshaft shop made a fresh assembly for me and the vibration never came back. Glad you found it ok! These cars are so nice it's hard to live with a ****ty vibration like that.