Possible Transmission problem on 2002 Saturn L200

Car shakes when car speed is between 50 & 55 MPH. Is this a transmission problem or something else.

Asked by for the 2002 Saturn L200
First thing is to have the tires rotated and balanced, because a badly worn and out of balance tire will shake the car at certain speeds when it come in and out of balance
1 more answer
i had the same problem with my l200 i replaced the tire and rim and it still had a vibration in it so i replaced the axel and that fixed it i would start with your tire first