About a month ago my 09 JCW with about 50k miles on it started shaking when i would accelerate fast getting on the freeway. But it would stop once i reached a cruising speed and it would only do it periodically. However it is starting to do it more often and at lower speeds and while at cruising speeds. I can feel it in the steering wheel pretty bad. I know it's not my tires, they've been checked and rebalanced. What could it be? Has anyone else experienced this?

 

Check your tranny and motor mounts also check CV joints and wheel bearings.