the axles, springs, and frame are all the same between the F250 and the F350, the only real difference was that the 350 came with bigger rear blocks (4 inch block instead of 2.5 inch in the F250). Now this may be different for your truck cause in 1999 they did do some wacky things

 

Looks like 50 into Tahoe, nice haul.

 

She's just a 24', but it's a lot better than the 16' it replaced. I wanted a 30' but they can get expensive.

Those tow truck pics ROCK!!!!!

 

I found I could move 14-16 bales in 1 trip for real close to the same fuel as 5-9 bales. So it easy to see what 2-3 trips with mores bales save in fuel and time. I use tag-alone and goosenecks regularly. If I didn't have a trailer and was going to buy 1 do all trailer it would be a 24'-30' gooseneck.
I get a good discount on feed, but I have to buy in 2ton bulk or 3ton sack. I buy in 10ton sacks or bulk. Depends on how I'm feeding. Sure is easier loading 10ton on a trailer than a ton in the bed.

 

Yeah, for sure... 3K in the bed gets old after awhile. 10K on a trailer would be bit higher than Ford says, but not enough to be really pushing it. Assuming the trailer was around 4K in weight, I'd be around 14-15K in weight... Ford says 13,500lbs max.

You're right on the blocks... except for the e99 which had 4" blocks on both models. As far as springs go, I think they're the same in the front, but I believe the 350's were a leaf or two heavier in the back. If you look at alot of those trucks, the 350's had a more raked stance... I know the blocks were taller, but it's still more than a 2" rake. As for axles, I know that some 250's had the same D60 front axle as the 350 and some had a lighter D50 (I think... it went something like that), but they had different rear axles. The 250's had the Sterling rear which is rated at 7K of axle weight while the 350's had a D80 which is rated at 10K of axle weight. Hope this helps... I wish I knew what the biggest differences are between the lighter Super-Duties and the heavier ones. I know the frames and axles are the biggest ones, but what about the engine and trans? As far as weight goes, it's not the drivetrain, it's the axles and frame that are the limiting factor, right?

 

Drivetrain plays role when you want to pull 10,000 lb at 75 mph.
Back in Europe I have seen 2 cylinder, 21 HP Fiat126 pulling travel trailers over the Alps. Sure they didn't go over 2nd gear too often, but they did it.
Now I do have Dana 80 on my F450 and I carried over 10k on it on several occasions. Since the axle is in the front of the center of the bed, the 10k of gravel is likely adding 11k to the rear axle. Not counting the weight of the truck..The duallies on the rear axle are rated for 14,000 lb .
To be honest, my neighbor was carrying 10,000 of gravel on his Chevy 1 ton dump truck as well.

 

the dana 60 was a year thing. as for the axles and springs they are the same. here are some links - as for the reason the 350s sit a little higher that is because they come with larger tires.
https://www.ford-trucks.com/forums/1...ce-please.html
Difference between F250 and F350 besides springs - Diesel Forum - TheDieselStop.com

 

Wow... I learn something new everyday. Well, whatever springs I've got now are alot heavier than 350 springs. If I'm right, they're equivalent to 450/550 springs...

 

 

The 09's are the same...275/70 R18's...unless you get the 17's or the 20's...Of course, Tire Rack doesn't think a 250 came in a crew cab apparently...MY tires are 275/70's though. Just looked. That Diesel Stop post was from back in 2002...like 8 years old.
http://www.tirerack.com/tires/Select...Clar=Super+Cab

 

I am running 275/70 R 18's as well. Mine is an 08. F250.

 

My F350 has minivan-like 245/75R17s on it. Tire sizes between the SRW trucks are identical.

F350s have the overload springs in back that are part of a package in the F250s. They also have 4" blocks instead of 2" blocks, and for some reason that 10.5" rear axle is rated for 7,280 lbs instead of 6,100 lbs on the F250s. There's some debate about that, as Ford lists different spline counts and axle shaft diameters, but parts guys reference the same parts numbers for 250s and 350s.

 

?? Ohhhh...you mean between the 250/350's the sizes are identical. You got the heavier duty payload with those 17's.

 

 

Looks like you were being testing for your backing up skills there.