I have a 2001 Expedition with the Premium Sport option, that may be important later.
I have 9300 miles on it now and it has always seemed a bit squirrelly on the highway.
It just seemed to wander more than I'd expect even a new 4x4 would.
My previous vehicle was a basic longbed '88 F150 4x4 with factory quadshocks up front.
I miss the way that old rust bucket handled even with 136,000 miles.
I asked the service department to check out the alignment while I had it in for a leaky AC compressor at 5k miles.
Their reply was "that's just the characteristic of the vehicle". Okay,.. I took that as an answer for now,...
I had thoughts of changing the shocks out since I wasn't happy with the bounce ride too, it was too soft for my liking,
and I thought this could help with the handling issue thinking body movement changes steering geometry.
I put on four Monroe Reflex shocks,.. it gave me the ride I was looking for but not the handling I though I should have.
Then to cut to the chase here, just last weekend I loaded 4-bikes onto a hitchmount bike rack.
Not thinking much of the additional weight tilting the chassis down slightly in the rear.
Jumped on the highway for the state park,...this thing handled sooo much better,... the beast was tamed!
Reading up on alignment, I think this thing needs more negative caster to emulate what I had gained with the rear weight.
Has anyone been here before,...? I doubt I get any interest or action from the dealer with this story.
I also wondered if the alignment specs are different for a EB which sits lower than the XLT Sport from what I've seen.
I wanted to ammo up before heading for an alignment job.

Thanks,...

 

First off, welcome to the #1 Ford site on the net! These trucks can get a bit squirrely at highway speeds. Keep in mind that they have pretty big tires which tends to give you a bit more leverage, hence the squirrely movements. If it's tweakin' a bit, I'd put a steering stabilizer on there. I personally don't know where to get one, but there are some folks on here that could steer you in the right direction (no pun intended )

XXL

 

Oh, also look into new sway bars. I have the Hellwig rear bar ($135) which fixes up the tubby handling on this vehicle in a snap! I recently heard that Hotchkis makes front and rear bars for the expy (whole set is $500-$600). When I get some money, I'm probably going to upgrade to the Hotchkis set. But check out the Hellwig bar - it's a must-have.

XXL

 

Do not spend money on aftermarket parts until you first make sure your problem isn't someting very simple. Better to solve the problem than to just hide the symptoms and risk your life.

First make sure your alignment is within the specs called for considering your model and set up. Make sure you have the same size, make, model, and tread pattern on all four corners.

Regardless of what it says on the door, or what make of tires you have, make sure that you have at least three to four pounds less pressure in the front tires than you do the rear, and that they are the same pressure side to side. The X is very sensitive to tire pressure changes.

Hope this helps.