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You might try actually reading the manual before saying Ford doesn't recommend it.
From the '05 Ford Super Duty Owner's Guide (p247: Tires Wheels & Loading)
SNOW TIRES AND CHAINS
Snow tires must be the same size and grade as the tires you
currently have on your vehicle.
Note: If your vehicle is equipped with 20” tires, do not use snow chains
on the front tires.
The tires on your vehicle have all weather treads to provide traction in
rain and snow. However, in some climates, you may need to use snow
tires and chains. If you need to use chains, it is recommended that steel
wheels (of the same size and specifications) be used, as chains may chip
aluminum wheels.
Follow these guidelines when using snow tires and chains:
• Use only SAE Class S chains.
• Install chains securely, verifying that the chains do not touch any
wiring, brake lines or fuel lines.
• Drive cautiously. If you hear the chains rub or bang against your
vehicle, stop and re-tighten the chains. If this does not work, remove
the chains to prevent damage to your vehicle.
• If possible, avoid fully loading your vehicle.
• Remove the tire chains when they are no longer needed. Do not use
tire chains on dry roads.
• The suspension insulation and bumpers will help prevent vehicle
damage. Do not remove these components from your vehicle when
using snow tires and chains.
Been running chains on my 2000 since new. If it snows in the mountains of Virginia it will be wet and slick. If you're lucky there will not be a layer of ice under it. Without chains my 250 diesel will go sideways without batting an eye. My 85 150 gas will drive circles around it.
I don't care what the owners manual says I keep chains handy in the winter.
My dealer gave me an addendum to the owners manual they said was from ford that stated not to use chains but use cables instead, maybe it was just the dealer doing it, they also had me sign a paper stating that I recieved this addendum for both my '05 and '06. Also recieved it when I bought my '00 and '94. So maybe it is the dealer trying to cover their butts I'll have to dig into this and see.
I found the copy I have it says. "tire chain disclosure, As equipped this vehicle may NOT be operated with tire chains but may accomodate some other type of tire traction device."
edited again, I looked up Class "S" chain on the internet, they are ultra low profile for close clearances and are chains, So my dealer is producing their own info to cover their butts. But why close clearance chains on our trucks. So sorry for the misinformation I will take it up with my dealer and see waht they say.
Ya. Telling them you are from Alaska don't help either.
Chains??? What the heck is that. Just curious are chains being used down in the SE AK??? No one uses them up here. Well I should say that you do see those from the lower 48 that are in the military with them here and there but usually they go to studded tires after hasseling with them once. Just get a good set of studded M&S tires or sticky rubber.
Rain on ice. The Alaska Shuffle. Yall know what I mean if you do it. I use those flip-floppy things with stud/bolts on the bottom and step in those with my boots. Great for traction.
The local weather warning here said that the sidewalk will be to slick to walk on without studded foot wear. Boy is that an understatement. Just stop to take a leak and grab another frosty. Your Buddy is going to jump out his side to help you (or maybe just trying to save the frosty. So the next rig come along and sees you both floundering around on you belly's. So they stop and jump out to help and go down like a gut shot rabbit. Than along comes the next. Well you get the idea.
That's usually around April here. A foot or so of ice in the parking lots and it will start to change over to rain/snow. NOTHING worse than fresh rain on ice...... But yea it can be funny. First thing I taught my kids was the winter shuffle, of course at winter time...
As for vehicles. Put the bumper of your car against a bollard then see how fast you can go. Without studded tire you can go well over 100. With studded tires it makes an ice shaving show... Not that I would know.