Recently I installed an RE hack and tap SYE with a high angle driveline shaft. Ive gone through numerous trouble shooting techniques but I am still getting vibration at 50 MPH+. I belive that my stock output shaft is out of round or the flange is not true to center because it show being off by .013". I even reground the shaft flat and it made no difference. The only thing I can think of to correct the problem is to but either tom woods sye or curries that comes with an already cut shaft. I dont want to get a HD SYE because I would have to buy a new driveshaft. Does anyone have a stock output shaft that I can have or purchase cheaply? Currie and Tom Woods charge a $200 core charge.