On my 2000 model 528I there seems to be what feels like a tire out of ballance at cetain sppeds but at those speeds only at certain RPM's this makes me think it is possible a sensor on tha fuel system, or or does that sound like tha tourque converter, I saw that there were a few problems with tourque converters going out in the 80,000 mile range and my car is at 85,000. I have had the tires ballanced and they were slightly out but the problem is still there, as I said it seems to do it only around the 2000 RPM range at certain speed like 40 to 50 and 70 to 80 and while this is happening you can accelerate and the problem goes away, also it is not throwing any code at this time, What do yall think?