My 2007 Nissan Altima has been shaking for the past few months. When first accelerating it's more of a wobble, when I get over 50 mph it shakes - not violently but noticably. The steering wheel and the entire car. I have replaced all 4 tires, replaced a bent rim, had 2 alignments and numerous rotate and balances. I still have the same issue. All of those repairs were done at an NTB, should I take it to a Nissan dealership or can someone help me figure out what the issue is? It's rather annoying at this point.