I do have 99 F250 SD V10 for 12 years now,and I would like to get new truck this year.I like to get used 2008-10 F350 drw.I saw few F450 for about same price.Is there any reason not to buy F450?
I will use it for constraction,l put ladder rack on it.I only tow 6x12 open trailer few times a week.
Thank you.

 

Check the weights of the trailer & truck (450), it might put you into a CDL.
I had to get DOT #'s for my truck with my 6x10 dump trailer.
The GCVW of my truck & trailer is 23,000, if you are over 26,000 you will need a CDL.

 

An F-450 won't put you into a CDL, but before you buy one you may want to call your insurance agent and ask what your premiums will be with an F-350 vs. and F-450.

With the 2008-2010 generation an F-450 is just a heavier truck with more capability. The current generation F-450 is more a dedicated towing machine, compared to the F-350 DRW which is better at hauling a load.

 

If the 450 is rated at 15k and the trailer is any thing over 11k he would need a CDL.
It is a GCWR or 25,999 or more.
He will need a DOT # for a 450.

 

CDL is needed for trailer above 10,000 lb.
Don't worry about it just driving F450.
My F450 has 19.5" wheels and my set of the tires has total of 22,000 lb capacity. Trust me I was very close to the capacity and likely exceeding it on the rear tires more than once.
I believe the biggest difference between F350 and F450 is differential ratio. I drive 65 mph on my diesel at 2600 rpm.
The engine has so much torque at this rpm that I can have 30,000 lb set and take all freeway overpasses on highest gear. Bottom line -it cost extra in fuel consumption when driving with small load.
Check with your state authority. In lot of states vehicles above 10,000 lb should have special registrations and pull to the scales. Depends on the model F350 might be rated above 10,000 lb GVW as well so read the door label.
BTW the DOT number is required for business going over the state line regardless the vehicle weight. Meaning driving Prius with your toolbox to the customer in other state legally require DOT #, but you can skip scales

 

Thanks.I will look for F350.

 

Is the dually something you want, because you certainly don't need a dually for a 6x12 trailer. They do look cool, I gotta admit that.

 

Dually tow way better regardless the trailer size. I have both and the difference is VERY noticeable. Both trucks run on 90psi tires.