Does anyone else have this noise/problem?
When I am driving and hit a bump in the road, especially when the rear tires contact it square. I hear a clunk at the rear end. Sounds like suspension, loose tailgate...
My truck is a 2016 F250 Crew Cab Short Bed. It has a factory installed fifth wheel hitch. I have looked at the obvious, spare tire, loose bolts... I removed the tailgate and it still makes the sound. I removed the insert in the receiver, still makes the sound. No goose neck ball in fifth wheel hitch. Checked bed bolts. Cant find it. Drives me crazy.
I also have a 2008, exact same truck, 200,000 miles, no clunking. I have driven in my friends 2014 F350 Crew Cab Long Bed, it clunks. Dealer pulled a new truck off the lot today, took a drive, it clunks. WTF! Dealer can't find it and confirms there is a clunk.
I hope someone out there has heard this and has a fix.
Thanks
Mario

 

Mario, I have the same truck and haven't noticed it but only have 1300 miles. I'll try to pay attention next time I'm out and see what I hear. How loud? Metal on metal or a padded clunk?

 

It is more of a metal on metal sound. I only have 12,500 miles.

 

My 14 has had a clunk in the front end since I bought it new...57,000 miles later and hasn't caused an issue yet. I'll know what it is whenever it breaks.

 

Lose shock or spare tire. Get under it and have another jump in the box and observe for lose components.

 

Is that the infamous Super Duty clunk?

Slip joint regreasing

 

No clunks on mine with 23k miles.

 

No clunks here.

 

Check your rear shock mount bolts at the top. I had one lose that was driving me nuts trying to figure out where it was coming from.

 

Spare tire is not the problem. I personally have not checked the shocks but I will today. The truck has been at the dealer for 5 days

 

I drove mine and purposely aimed for the bumps and never heard a clunk. Good luck on the diagnosing and keep us posted.

 

Mine had 36K on it and the rear shock worked itself lose.

 

Well it took me a while but I found the clunk. My truck has overload springs from the factory, my 2008 does not. There is a strike plate for the overload springs that has a plastic, probably for the spring to slide on and to reduce noise. I took a piece of foam and put it between the spring and plastic piece on the strike plate. I then taped it to the strike plate for a test. The clunk is gone.
So i have figured out what makes the clunk. I just have not yet figured out how to fix if permanently and have it look good. The plastic pieces on the strike plates are a bit loose, so I was thinking of shining those tight. Maybe will work.
I was also thinking of a rubber piece on the strike plate, but then the spring will likely not slide and probably rip it off.
Any ideas out there? Maybe some has made a fix already?
Thanks Mario

 

Can you post a pic? I ask because I had rubber bump stops (for lack of a better description) on my 2011 F350 rear suspension that had rotted away, so I replaced them. I discovered them when I was searching for the source if a rattle somewhere (turned out to be a loose shock mount)

 

I also have the clunk! Only from rear and only when hitting a sizeable bump like a sunken culvert and only when hit square. Mine is 2016 250 with gooseneck/5th wheel factory hitch and overload springs from camper package. I have less than 1000 miles on mine and don't really drive it in winter ( bought end of September) so I haven't taken time to look for it yet. I did however iinstall airbags last week and did not notice anything loose while under it for a few hours. I will have to look closer when it warms up again as it in in my pole building but no heat.