my '15 328 ix transmission works like a dream...smooooooooth/fast/quiet.icould not ask for more. now,with my lease ending,am testing the new 330ix. transmission seems different/worse. I drove a few,and when shifting in manual/sport under frisky acceleration between 5-6000 rpm it seems to shift slower,noisier and with a clunk and a thud. dealers claim this is normal. anyone else notice this????? my '15 does NOT do this.