Define shaking. It's too vague. Does the wheel move or vibrate in your hand. What do you feel on floor or your foot against the firewall? What do feel in your butt through the seat. Does the soaking start at a speed and increase with vehicle speed? At the shaking point what happens if you step on the brake with light to medium pressure?
If it was engine related to would increase decrease with rpm.
You can have a tire way out of balance with worn out shock absorbers, creating a high at speed vibration.
A at road speed , shaking or vibration ?
Shaking as in the " Dodge death wobble " or vibrating like a flat spot in shopping cart wheel?
Whatever it is we can't feel , see or hear it. Your best , most complete description will get the best answer.