It for superduty 4wd that use leaf spring for front axle.

It not shake but more like little bounce if you go 60-75 mph but over 75 mph no bounce. It more like steady bounce like wind hit front.

Is that mean shockers is bad? It just 2 month old it have 4,000 miles on it.

I don't mind but my stomach get little upset from little bounce for 250 miles on Highway.

I don't remember if it do that when we bought back in 2001 since it been sit lot this year.

 

I'll throw in my two cents.

My first thought at the beginning is the simple culprit of an unbalanced tire. Perhaps a wheel weight was thrown off or maybe it has a broken belt inside the tire itself and it's only a small break so only affects the ride at a certain speed.

With that few miles I don't think the shocks are the problem.

You then mentioned that the truck has been sitting a lot. Is it possible the prolonged sitting created a flat spot on one of the tires? You may have one tire of poor construction. That would produce more of a bounce like you said then a vibration. I understand that the truck is literally brand new but... factory tires are ALWAYS the cheapest the company could find.

To start isolating the problem just have your tires rotated. Make sure to try and figure out the general location of the bounce (front, back, side to side) before you have them rotated. See if that changes what the vibration does or the location.

I just realized!!! you have a brand new truck, right?? Take it back to the dealer. Make a mechanic drive on the highway with you and point out the problem to him. You just paid an arm and a leg for a truck and the contract said nothing about bouncing on the highway. Before he says anything, make sure he understands that NO vehicle is supposed to bounce around at 65 miles an hour. They are ALL designed to travel that speed.

As a side note, don't 2008 superdutys have coil springs in the front?

Can you provide some details on the truck? model year, body style, spring package?

 

2001 wow where were you

 

sheesh, I'm going to blame my total blindness to being asleep at the time of the reply. He used "it" instead of "they" when referring to the shocks which threw me off too. Should have caught that too.

My two cents are now worth less than a penny.

Everything I said about the tires still applies. I don't think it's the shocks.

Oh, by the way, don't go yell at a dealership.

 

DC my" wow where were you" wasnt directed towards you

 

I know the I-25 in Colorado flat-out SUCKS. At 70mph-ish you get a bounce and that comes from the road itself being wavy. I thought my suspension was totally shot when I bought my truck until I drove it back East on smooth roads.

(NOTE: I-25 is the major north-south highway through Colorado so it gets heavy big-rig traffic)

If it does it everywhere, then there is definitely a problem with the truck.

 

It doesn't do all times if it was pavement it smooth but road on I75, I94, and I96 had cement so it bounce but very few pavement on highway now.

It 2001 F250 crew cab long bed with V10 4x4

 

No bounce or weirdness on my 08 or 09 but I will say if you hit a good bump in a turn it will skitter halfway into the next lane.
Just like a rigid frame motorcycle.

 

Looks like you're in Wisconsin. Here in Minnesota we can get tube sand for about $3 a tube, where each one weighs 70 pounds. I'd try putting 300 to 400 pounds in the bed to see if things quiet down. The long beds do want to bounce....

 

Tires. My 2001 cups some brands in only a few hundred miles, other brands wore normal. Tire Dealer said Big Trucks do that. I said I was not born yesterday. We finally agreed on a price reduction on a new set of Yokohamas.

 

Tires is fine no cup.


I am in Michigan which is #5 worst road in USA


We could try add 600 steel plates in bed and see what happened.

 

Cement/concrete roads are built with expansion joints.. Our trucks long wheelbases' don't like how those roads are built and so they hop. The truck seems like it gets into a bouncing rhythm at certain speeds as it's driving over one joint to another. My truck has always done the same thing (2000). It's fine on asphalt but as soon as you hit the expansion joint roads, you'll bounce. Some have had good results by replacing the shocks while others haven't. Check out this thread, lots of good info:
https://www.ford-trucks.com/forums/8...ther-post.html

 

I have a 2001 F250 super cab 8 ft. bed and live in PA. My truck does the hobby horse routine on concrete expansion joints also. Loaded is definitely better/ smoother. and from your description I would write it off to nature of the beast.