why does my car shake when in drive but not in motion? at a stop it will shake- on 2003 Oldsmobile Alero

until i take off. what causes this to happen?

Asked by for the 2003 Oldsmobile Alero
Have compression checked, and for vacuum leak(s)! Low compression, or misfire, on one or more cylinders can cause this, a vacuum leak also!
It is still there when driving down the road, just not as pronounced.
1 more answer
Also , just a thought......maybe bad engine mount(s)?