I have a 2000 B2500 Mazda, sat for a couple of weeks getting timing belt replaced, Now slow speeds, steering left or right the column and front wheels shudder. Was towed once on attachment hooks underneath for 2.5 miles. Otherwise no handling problems.

Probably a valve lifter stuck!

Could be the power steering pump is bad.

How new are your tires and when was the last time for a front end aliment?That might be it.

It is the same as the a Ford ranger. The location is Under the dash to the left of the steering column.

It may be reacting to a vehicle stability control system, visit honestautoestimates.com for free complete information about any repair including how much it should cost.

wrong it can be .... the pump has an impeller in it
at low speeds it might be working fine.. but at higher speeds the impeller is slipping so it is not moving the oil like it should... replace the pump...

I have a 2006 Mazda 6 wagon - same car under the skin as your fusion. If you have a telescoping steering wheel, it might be that the grease they used for the steering column is substandard. I just fixed my clunky steering by releasing the telescoping/tilt lever and pushing the steering wheel in and out a few times (i repeated twice after 2 short test drives with the problem improving each time); this eliminated the noise. Blogs for the Mazda 6 indicated this. Give it a try as it's a free fix. If the problem comes back, and some indicate it will, the dealer may need to relubricate the steering column with a better grease. This is the fix for the Mazda6.

With the engine cold, open the hood and check the play in the power steering belt, it sounds loose.Look at it close before you tighten it, it may need replaced if it looks at all dry or shaggy.
I hope this helps you.

check tyres for wear-wheel balance needed if visibly ok-have a wheel alignment after a tyre rotation-best even tyres to be put on fronts-they will carry out a safety check all suspension and steering before doing the wheel alignment

Sounds like you have air in your steering system. I would start by looking for any leaks on your steering system like hose to fitting crimps, steering pump, etc. Check your steering fluid level to make sure it is full and also look for bubbles on the dip stick. If everything looks good, start the vehicle and turn the wheels all of the way to the left and then to the right. Do this while the vehicle is in park and repeat at least 5 times. This will work out any air in your steering system. If the problem persists then the power steering pump may need to be replaced.