Feels like engine jumping
 

When I hit around 30-40 mph it will start shaking toward the right side and have to slow down to sped up again.Feels like the whole engine is shaking. but only does it some of the times

Motor mounts, wheel out of balance. Please post details about the vehicle in question so we don't have to guess.

It sounds like a problem I had. I think it's called a shift-solenoid pack went bad.
I don't know if it throws a code, but I would get a scan 1st. :)

Again a 5 year old post. Please read the dates.