Yes, my 2008 4.8i has a really rough transmission (as does our 2007 750Li). Sometimes it jerks/pulls so hard, it feels like whiplash. I've noticed that in general the transmission is rough, holds gears too long, downshifts almost violently when going up a steep grade and generally gives abrupt/rough gear changes. Besides from the non-heat resistant front windshield, the transmission is the most disappointing feature of my 4.8i.