Since doing some driveline R&R I've had this vibration problem. I know the usual answers to the question. I got the two halfs lined up after not doing it right the first two times. After reading the FAQ again I realized that I had rotated the rear flange on the axle 180 degrees. Once I moved it back it felt better. But I still get a vibration mostly at around 35-60 mph. I can feel it in the stickshifter (m46). Its got a low thundering sound although much better than when the two halfs where mis-alligned. I replaced the transmission mount at the same time although its a bit spongy aftermark POS feeling. But I can't see it being the cause. It feels like the vibration is still in the rear half of the driveline. Although here is my question that I'm left with.

Does the front flange on the transmission need to stay where it was prior to removal. If that on is off by 180 degrees is it going to cause vibration like the rear one did? I'm left to think that maybe I'll just put the hose clamp on and try to see if I can't balance the thing somehow. I'm stuck. Other than my torque rod bushings needing to be replaced I can't imagine what it would be. It didn't have this problem before with the torque rods being bad.