In my case the shudder is only under a fair application of power eg going up an on ramp.

The symptoms above (low power request, gear hunting), sounds a lot like the lock up plate grab/slip.

I can monitor input/output shaft speed with foxwell and would make it pretty obvious if the lock up plate isn't.

__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)