car shakes on acceleration it gets real bad around 40mph when you reach a speed

poss bubble in tire? axle or bearing issue will also cause this

2004 Volvo recently started to sound like something was loose when driving. Then the vibrating started. My mechanic took off the right passenger motor mount . Yes, it was damaged . I'm planning to fix it soon. FYI . The 2004 Volvo for some reason made a 2 different motor mounts . There is a $100.00 kind and a $200. With my luck .. I had to purchase the $200 dollar part ..