4x4 IFS Swap in Heavy truck

[MTVR]

Words mean things.

I have been asked to correct countless police reports over the years, and asked to teach report writing. If it were not for proof readers, we would have "The peni$ mightier than the sword" or "A fool and his monkey are soon parted".

After many many years of learning to defense attorney-proof my reports, I have a keen eye for stupid stuff. Eventually, defense attorneys began telling their clients to just plead out if I was the arresting officer.

Everybody is good at something- I used to work with a captain that could drive through a closed park in the dark with no headlights, dynamite the brakes in a full ABS stop, jump out, and find a couple attempting to start a family. I don't honestly remember if quickfarms and his passenger were ever among them.

 

[BeNimble]

So it looks like the front axle on a F-550 is the same as a F-250, F-350, F-450 Super Duty, they all use the same Super 60.
If anyone can confirm or deny...finding a f250 is going to be MUCH easier than a F550

 

[charlieaarons]

So it looks like the front axle on a F-550 is the same as a F-250, F-350, F-450 Super Duty, they all use the same Super 60.
If anyone can confirm or deny...finding a f250 is going to be MUCH easier than a F550

If you are scoping out the possibility of a solid axle, I would not go any smaller than a customized (even bespoke built by Dynatrac or other if the budget allows) Dana 80, at a minimum, with maximal strength parts. Even the F550 has a maximum GVW of 19500 lb, I believe (anyone please correct if they know of a higher rating). It is the experience of many of us building RVs on medium duty chassis that maximum loaded wet weight can be as high as 90% GVW.
It would be useful to know what engine and transmission you have, also intended tire size, rear axle make and current ratio.
Also what the placard on the door says front GAWR is.
Also a last thought: don’t grab a NP205 transfer case just because people and 4wd magazines say “it’s the strongest factory transfer case”. They don’t mention that the statement applies only to light duty vehicles.
You’ll need something bigger, heavier and stronger because of the load.

 

[MTVR]

Yes- medium-duty (or better) drivetrain components would be appropriate for a medium-duty truck like his 700-series Ford.

 

[IdaSHO]

You mean like the Super60 that's under my 3/4 ton?

You mean the SAME axle that's under every 4wd F250/350/450/550 from 2005-2016?

 

[quickfarms]

Eventually, defense attorneys began yelling their clients to just plead out if I was the arresting officer.

Yelling?

And this from the grammar police!

Very rarely do I ever have to go to court because my reports are not challenged and are accepted without the need for clarification or explanation.

I used to work with a captain that could drive through a closed park in the dark with no headlights, dynamite the brakes in a full ABS stop, jump out, and find a couple attempting to start a family.

The only reason he would have to dynamite the brakes is if he was speeding through the park, so you are condoning this practice of endangering the lives of any people or animals that may be in the park.

I don't honestly remember if quickfarms and his passenger were ever among them.

It’s not hard to out smart the cops

 

[MTVR]

There is a difference between a typo on my phone, and some booger-eater who simply doesn't know what words mean or how to spell them.

Thank you for proof-reading my stuff, Super Trucker...

 

[MTVR]

The only reason he would have to dynamite the brakes is if he was speeding through the park, so you are condoning this practice of endangering the lives of any people or animals that my be in the park.

Are you drunk?

There is no correlation between him doing something and me "condoning" it.

You're always "that guy", aren't you, lol?

It’s not hard to out smart the cops

Apparently it's only hard for you, Super Trucker...

 

[BeNimble]

You mean like the Super60 that's under my 3/4 ton?

You mean the SAME axle that's under every 4wd F250/350/450/550 from 2005-2016?

Is that a confirmation that they are the same? The 10-lug is just a different bearing/hub that would drop in from what I can tell. thanks!
The C700 has a 26,000 gvwr, but as I said in the first post of this thread, I'm not getting anywhere near that.
How much does an aluminum 22ft box weigh?

 

[IdaSHO]

Yes, the axles themselves are the same.
Its the knuckles and hubs that differ, based upon application.

A Super60 would be a fantastic axle under the front of that.

If It were my project, Id be tossing running gear from any 2005+ DRW superduty under it.
Coil sprung (or leaf if you prefer) front Super60 and rear Super110 (Both Dana)

 

[Buddha.]

I didn’t see it mentioned, the 10 lug 450 and up is gonna be the wider front axle that turns sharper.

 

[BeNimble]

The part numbers for the Knuckles appear to be the same for 250 and 550. It might get more turn if the drw adapter makes them stick out further from the hub?

 

[IdaSHO]

Yeah, Ive seen some applications where the knuckle itself is different. I cannot recall which.

The DRW adaptor does provide for a tighter turning radius, as it pushes things outboard, creating more space between the frame and the tire.
Also has to do with the DRW wheels.

No matter, the coil sprung Super60 has a crazy turning radius compared to the old 60 on leafs.
Those trucks need 4 lanes to turn around

 

[Buddha.]

The part numbers for the Knuckles appear to be the same for 250 and 550. It might get more turn if the drw adapter makes them stick out further from the hub?

The 450 dually is wider (and turns tighter) than the 350 dually. Not sure where the extra width come from.

 

[IdaSHO]

I didn’t see it mentioned, the 10 lug 450 and up is gonna be the wider front axle that turns sharper.

I've seen reference to that over the years, but I've never seen the hard data to show actual axle housing differences.
I've always chalked it up to hub adaptor differences.

Much of the confusion starts with D60 VS SD60 chatter, along with what was called a "fat-boy" D60,
that I believe was nothing more than a Super60 under 3/4 and 1-ton trucks when it was introduced.