Looking at a 21' travel trailer with a dry weight of 4100 pounds. I have a 15 f150 fx4 scab 5.0 3:55 rear. Would i need a weight distribution hitch? Most trips will be here in flat florida. Hitch weight is around 400 pounds.

 

If it were me, Id try w/o first. Not too long and pretty light so its not something I would sweat.

 

Load distributing and sway control are pretty much always a good idea when towing a big brick like that.

can it be done without? Yep. But why take the chance?

 

One thing to remember, when towing that a weight distributing hitch will also usually have a sway control and leveling feature between truck and trailer. Makes it far more comfortable to the driver when driving on the highway. Why take a chance for just a few dollars saved.

 

Not quite the same, but I have a 16ft hybrid TT (tented sleeping beds on end), dry weight 2800, loaded 3500. I tow it without a WD hitch. Handles it no issues at all, I really like I do not need to mess with a WD just drop it on the receiver hitch and go.

I do have a sway bar that I can use. Just one those curt friction sway control bars <100$. I do not always use it, if I am towing somewhere close I don't typically use it. If a long tow with interstate highway I tend to hook it up. It does help with sway control for sure. Actually sometimes it seems the lighter trailers get pushed around more by passing trucks, and winds etc. The sway bar helps with all that. My RV dealer said I really did not need the sway bar with my truck, but it is helpful to settle it down if towing to the beach or something like that.

So not quite the same as you are looking, just my experience.

 

Dealer is telling me I don't need it.

 

Yes. Your max trailer weight is 5,000 pounds and the hitch is 500 pounds. That trailer empty is approaching your max. Will your truck handle it? Yes. You will be a lot safer and have more control with a weight distribution hitch.

 

That's not a heavy TT (you will be under the 500lb hitch weight limit), so I would try it without. If you don't like the feel of the drive, then consider an Andersen WDH since it will give you the anti-sway and anti-bounce you would be looking for.

 

Specs say 305 pound hitch weight

 

Where do you see that?

https://www.ford.com/resources/ford/..._F150_Sep7.pdf