3.73 vs 4.30
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Freshman User
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3.73 vs 4.30
Why does the F-350 Dually come with 3.73 gears and the F-450 dually comes with 4.30 gears? 
Also which would get better mileage?
I will be pulling a 5er with a Gross Weight of 15,500 and pin weight of approx 2,250.
Also which would get better mileage?
I will be pulling a 5er with a Gross Weight of 15,500 and pin weight of approx 2,250.
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From: herriman utah
I can't imagine a situation where I would want 4.30 gears. someone should do some figuring but I would bet locking out 6th gear with 3.31's or 3.55's would have the same effect as 4.30's in 6th gear. remember you can always gear down with lower numberical gears and a 6speed auto.
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For what it's worth, I traded my TT for a 15.5k gross 41ft fiver with 2350 pin weight. My 2011 f250 psd with 3.55 and 20's tows the fiver like a beast, although airbags were a must. I wouldn't go any lower than a 3.73 in the f350. I average 13 mpg at 55mph, 12 mpg at 65mph, and 11mpg at 70 mph with the fiver in the long rolling hills of Georgia piedmont region. The same truck towing the 7k lb TT got 10.5 mpg at best and 9.5 at 70 mph. The truck towed the TT for 30k miles and the new fiver for 400miles since January. With my current setup being the same as yours, I would go with a f350 srw at least and drw350 at the most. It's amazing the difference aerodynamics have on Mpg's
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You better look at your state law I have a 350 srw and I have a 5th wheel 25 feet 14500 gvw I can't haul it Legally they go buy what the sticker is on the door and trailer truck is 11500 and trailer is 14500 = 26000 the gcwr is 23500 that mean by the government Mythical numbers you are over its not what you weigh it is what it can haul got to love the government
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F-350 SWR GCWR is 23,500
F-350 DWR GCWR is 30,500
F-450 DWR GCWR is 33,000
Crew Cab 5th Wheel Towing Capacity is
F-350 SWR GCWR is 15,900
F-350 DWR GCWR 2X4 is 22,200 to 22,600 depending on gears
F-350 DWR GCWR 4X4 is 22,800 to 23,200 depending on gears
F-450 DWR GCWR is 24,700
F-350 DWR GCWR is 30,500
F-450 DWR GCWR is 33,000
Crew Cab 5th Wheel Towing Capacity is
F-350 SWR GCWR is 15,900
F-350 DWR GCWR 2X4 is 22,200 to 22,600 depending on gears
F-350 DWR GCWR 4X4 is 22,800 to 23,200 depending on gears
F-450 DWR GCWR is 24,700
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Logistics Pro
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From: southeast PA
Your numbers are well within the F350 DRW ratings. I don't know about frame and the rest of the underside, but the 350 vs. 450 far as specs go from what I can tell are different gears, and the 450 gets the super 60 in the front.
That said, the 450 will get worse highway fuel economy due to the 4.30 gears, but they give it more grunt getting a heavy load rolling.
That said, I'd deal with 4.30 gears, IF they still offered 19.5 tires and wheels on a 450 pickup. With the only current offering being 17's, I'ms sticking to the 350, and I may go american force 19.5's later.
That said, the 450 will get worse highway fuel economy due to the 4.30 gears, but they give it more grunt getting a heavy load rolling.
That said, I'd deal with 4.30 gears, IF they still offered 19.5 tires and wheels on a 450 pickup. With the only current offering being 17's, I'ms sticking to the 350, and I may go american force 19.5's later.
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From: WY
I have a 350 dually with 3:73's and my 5er comes in over 19,000 loaded up. Truck and 5er roll down the hiway, up the mountain, down the mountain, off road between 29-30,000. I drive about 78 mph on the interstate and 68 on the two lanes. This truck has plenty of grunt to pull that load. Last summer me an ma put 4400 mile on in one trip. Took 3 1/2 weeks and I got 8.8 mpg. Driving slower would have helped but wouldn't have been as much fun.
A set of 4:30's would have kept me in the power band better on hills. But, 78 mph with 4:30 gears would net about 6 mpg. 3:73 is a real good balance of power and mpg. IMHO
A set of 4:30's would have kept me in the power band better on hills. But, 78 mph with 4:30 gears would net about 6 mpg. 3:73 is a real good balance of power and mpg. IMHO
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You better look at your state law I have a 350 srw and I have a 5th wheel 25 feet 14500 gvw I can't haul it Legally they go buy what the sticker is on the door and trailer truck is 11500 and trailer is 14500 = 26000 the gcwr is 23500 that mean by the government Mythical numbers you are over its not what you weigh it is what it can haul got to love the government
Logistics Pro
Joined: Mar 2005
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From: southeast PA
This got me thinking about Uncle Sam. Can we order a new door sticker with a higher gvwr? Mine shows 10,000 but I could have ordered the same truck with a higher sticker if I asked for it, right? So can we order a new one from Ford? I would like a 11100 like the new 2013's.
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Thanks everyone - it'll end up being an F-350 then.
I need the mileage more than the grunt power.
Here at home I don't have anything heavy to haul so the 5er will end up being the heaviest.
AND I know photos or it never happened!!
It may be a long while but belive me I will have plenty of pic's!
I need the mileage more than the grunt power.
Here at home I don't have anything heavy to haul so the 5er will end up being the heaviest.
AND I know photos or it never happened!!
It may be a long while but belive me I will have plenty of pic's!
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