While driving when i get up to or close to 55 mph, it shakes so bad i can barely control vehicle

Could be a bad steering stabilizer. It looks like a shock laying across the steering bars.

1. The testing has to start with the vehicle under 122 degrees F. Start the engine and idle for 2.5 minutes in Drive (auto) Neutral (MAN) A/C and rear defogger ON.

2. A/C OFF, accelerate to 55 MPH at 1/2 throttle and then 3 minutes of steady state cruise at 55 MPH.

3. Clutch engaged (MAN) no braking decelerate to 20 MPH.

4. Accelerate to 55-60 MPH at 3/4 throttle and 5 minutes of steady state cruise at 55-60 MPH.

5. Decelerate, no braking to end the drive cycle.

In some cases the Powertrain Control Module (PCM) will go into a logic lock not letting the readiness monitors run. Removing the battery cables and touching the two together will normally take care of the logic lock condition.

Hi Mikey. Take the vehicle for wheel balancing and alignment. Get the technician at the centre to inspect the steering and suspension linkages while he's doing the alignment, but I think wheel balancing will sort out your problem. Regards John

Would you not think that you have worn suspension parts ?

Go to You Tube Video & see the problems with that vehicle,
& watch how to replace various parts

Jeeps have this problem a lot, they call it the death wobble! On the ford it depends on if you have a 2 or 4 wheel drive vehicle, 2 wheel drive have your alignment checked, I've been fooled by them, and if it's a 4x4 you most likely have a bad steering stabilizer shock..

COULD HAVE LOW AND HIGH SPOTS IN THE BRAKE ROTORS.CHECK TIRES FOR DEFECTS.COULD NEED FRONT END ALIGNMENT OR BAD WHEEL BEARINGS CAUSE WHEELS VIBRATION.

Rael good indication of a tire out of balance or a drive shaft out of balance.

The speed sensor is malfunctioning on the transmission.I would not fix it as a result of the age of the car.Simply use a GPS for a more accurate speed

Lift the back of your car.With a stable rest and with the two hind wheels hanging, run your car up to the speed where you experienced vibration. have someone take care of the throttle and shifting while you observe the transmission shaft. You may have an imbalanced shaft.

crankshaft balacer going bad,can cause the crank to break if left unchecked