I have a vibration while im accelerating and not exactly sure where to look for it anymore. It does it around 50mph or so and just cruising down the road If I accelerate hard its not there and if I left off the throttle it goes away aswell. Its not really in the steering anymore than I can feel it in my but which is why it has me stumped. I checked my U joints which where fine and I have new tires. I was wandering could it be in the rear like the pinion bearing or maybe a motor mount?