Driving a shaking car is very dangerous but it could be the ball joints,tie rod ends sway bar bushings, CV axles or unbalanced tires.
go see a mechanic
Most worn out suspension components especially balljoints can cause shaking and inconsistent vehicle behaviour especially when driving on uneven surfaces. It is also risky to drive a vehicle on long distance trips if the balljoint is worn out.
Shaking at speed - probably due to poor wheel alignment or wheels needing balancing
Do you mean four wheel drive ? If so, it means all wheels drive a vehicle.
If you have not had a balance and rotation on your tires within one year, this can cause shaking of your vehicle. Also, if you have a lift or heavy duty tires, your vehicle will be prone to shaking.
it probably means motorcycle
When you total a vehicle, it means the car is wresked beyond repair and you cannot drive it again.
If the car starts shaking in second gear the motor mounts are probably going bad. Lift the hood of the vehicle and inspect the rubber inserts. If they are cracked and brittle they will need replacement.
There is an earthquake
depending on your vehicle, it could be the engine timing. when the vehicle is parked and running open the hood and look at the motor, if its shaking alot, its usually timing.
The most common causes of overheating and shaking in a vehicle are the head gaskets. A blown head gasket will produce overheating and shaking and may lead to a cracked head.
Shaking.