I've been reading up on what this could possibly be, but, still can't find an exact answer. Whenever I'm driving, but mainly at cruising speed, I notice a vibration in my accelerator. It goes constantly, no matter what speed I'm at. I thought it might be a cv axle, but ruled that out since I just replaced them. I heard that it could be my motor mounts, but I'm not sure. Could anybody give me an opinion on what it might be? Any if it is motor mounts. How do I go about changing out the inserts or whole mount????