Have 99 f350, 7.3 super duty dually. cold air intake, new stock turbo, 4" down pipe, new 5" exhaust, 6 point TS performance chip. additional trans cooler, rear air lift system. boost, trans temp and exhaust temp gauges.
I have been pulling a 37' 5er, 11800lbs loaded, pin weight 2000lbs. I am buying a 41' 5er, 14500 loaded, pin weight 2400lbs.

What do you think? Will the truck handle it?

 

You'd be going up 10% in trailer length and 23% in trailer weight. Does your truck have 23% more ability in it? Not trying to be a smart aleck...just trying to use numbers to ask the same question another way.

Edit:
Or depending on what your truck ways, your gross combined weight is likely going up around 10-15 %

 

You will be over the factory GCWR, I'm sure that the truck will pull that just fine as long as you keep an eye on the egt's but I would be more concerned with stopping it. Will you be loading the trailer to the max? If you can keep to around 20k total weight you'll be fine.

 

Your GCWR is 20k lbs. Your dually comes in at just over 11k lbs so combined puts you at 25.5. The dually should be able to hold it and the 7.3 should be able to pull it, especially considering all you have done to it. Stopping is the issue as Shovelheadrob said but no way will you be close to 20k target.
Sounds like a great excuse for an upgrade to a new(er) truck!

 

Thanks Guys-------Just had truck weighed and it is 7900 lbs with wife and I and full tank of diesel-----5er dry weight is 13800 lbs---we won't pull it with full tanks--all empty except fresh water about 10 gallons== hopefully will not put over 400lbs of stuff in it. Appreciate your input

 

pin wt would be more like 2900 to 3K. Do you have enough room for that amount of payload. Should be since you have a DRW.

 

Lokking to put heavy duty brakes on truck. Any suggestions

 

If you are looking for just rotors and pads then Stoptech rotors and Hawk LTS pads. If you are looking to swap out rotors, pads, calipers then you have some further research to do because there are options out there that range greatly in price.

Jump on the forum linked below and do a search and all of your questions about brakes will be answered.

1999 - 2003 7.3L Power Stroke Diesel - Ford Truck Enthusiasts Forums

I will say this, I installed drilled/slotted front and rear rotors with HAWK LTS pads and had zero problems towing a 10K lbs trailer cross country. This is through the Rocky Mountains and in TN, NC and up near Seattle. Just have to be smart about stopping it and act as if it is a tractor trailer you are driving.

Now that we have recently purchased a 5th wheel and towing it with the truck in my signature, I plan to upgrade the drum brakes on the trailer to disc brakes. The trailer provides a lot of stopping power, not just the truck. If you rely solely on the truck, you are doing it wrong. So, spend a bit of money and upgrade the brakes on the trailer as well if they are not already disc brakes. They are pricey, but think about it like this.

Would you rather spend $2K on trailer brakes or would you rather spend $50K on a new truck and trailer and have the guilt of possibly injuring someone because your setup was not properly equipped.

This is an easy decision for me.

 

I want to just toss out a thought. If you are new to this forum, one thing that may not be immediately apparent is many folks who post represent an atypical sample of RV owners, in my experience. That is to say, they use their RVs more frequently than the average owner and tend to be more knowledgeable. They often modify their rigs in a way that fit their usage pattern.

Before modifying yours, especially if new to all of this, be aware that modifications bring very little in the way of return at trade-in time. You might be one of the ones who travels far and wide and keeps your rig for many years, but the odds are you will use it seldom and rarely travel more than 200 miles from your home. When planning an upgrade, it is perhaps worthwhile to bear that in mind.

Just a thought,

Steve

 

According to tow ratings book for 99 350 with 4:10 dually rear end. Max fifth wheel tow is 14K when it was new.