Is the front axle out of a 94 F350 Super Duty dually going to work for my 4x4 conversion in my 96 F250? or is the dually more than 8 lugs?

I'm sure finding a F350 with 3.55 gearing is not likely so i realize I'll have to regear or take the 4.10's from the donor's rear axle....that's another question, can I use the donor's rear gears in my current F250 housing?

Thanks.

 

While it true there are more 4.10s out there I've found plenty of 3.55s around. If going the salvage yard route try car-parts.com. They list pretty much everything.

 

I think the F-Superduty's had a 10 lug front axle. However, all the spring perches etc. should be the same. I used to hear tale of what was called a "Super 60" front axle that utilized I think 1550 ujoints in the knuckles and had a larger ring gear like out of a Dana 70. But I've never confirmed it. I would think that you could just change the outter hubs and be good to go. I know the F-Superdutys also used a Dana 80, 10 lug rear. Anyway, if the axle is availiable to you for cheap, I'd get it because it will most likely have your gear ratio of 4:10, but may be 4:56. And hopefully you can just swap hubs. But all this is just my opinion of what I've seen.

 

If it is an F350 and not an F-Superduty, then it should be fine. I'm not sure on the F-SD. I used the front axle from a '91 F350 dually for my conversion last winter. Works for me. As for the gearing, the 3.55's are out there, but the 4.10's are more likely. Correct me if I'm wrong, but isn't the axle tube a bit shorter on the duallies rear axle?

 

IIRC the duallies are different with the way the tube place the bearings in the center of the dual wheel assembly. Using as a SRW configuration would place the bearings off center of the wheel.

 

you either have;
a) '94 f350 DRW pickup (didn't come as a 4x4.)
b) '94 f350 DRW cab and chassis (these did come as optional 4wd's.)
c) 94 F-superduty/f450 (these were DRW,but not offered as 4wd either.)

but you cannot have a '94 f350 super duty,because there's no such thing until '99.

if you have a parts truck that you'll be using to rob 4wd parts from,it's built in '94 then you have B.a 1994 F350 DRW cab and chassis.
the rear axle will NOT work in your f250 pickup,if your planning on a DRW swap.but you didn't mention you were anyway.
the front axle will bolt right in.
if you want to keep the '96 f250 SRW,then you'll just want to find someone who will trade D60 SRW hubs for your D60 DRW hubs(might i suggest the DRW hub receiver,pays for all shipping.)or sell them,whatever.and you'll need to buy a couple SRW D60 hubs,and SRW rotors.
sell your DRW D60 hubs with the rotors as a set.

if your donor truck sports 4.10's and your f250 sports 3.55's then yes,you'll need to swap rear gears.
the gears will be a direct bolt in swap from the this '94's rear axle (provided through process of elimination,i guessed your parts truck correctly) to your '96 f250's as they are both 2nd generation ford/sterling 10.25 full floating axles,with no changes made internally.


and a partridge in a pear tree.

 

Those are good points. If it is a cab and chassis, which is the only way you will find an OBS 4x4 dually, the rear axle will not work. It's too narrow. You'll need a rearend out of a normal 2wd dually if you are going dually....but if you are going single wheel, bolt in the front axle, change out the front hubs for normal single wheel hubs...which is a direct bolt on, no bearing difference, and your good to go.

 

but he wont be able to trade rear gears?
(provided he pays someone to do it with proper tools.)

 

I'm not going to assume that he can't do the job himself. But the cab and chassis rear gears will be a 10.50 ring gear, he has 10.25 right now. I'm 90% sure you can interchange them. However, this is one spot where I'd stop and call Randy's Ring and Pinion. Just to be sure. And not to mention, to do it right, you will need new setup stuff, crush collars etc.

 

Just to clarify, you would have change both ring and pinion if changing gears. Different size ring gear = different size pinion gear.