1995 F350 single vs dually

Mopower

Well-known Member
I recently purchased a 95 F350 dually almost identical to my 95 F250. Is the frame width the same? How different are the axle widths between a single and dually? I'd like to replace the box on the F350 and get rid of the duals if possible. I was told the spring locations were the same. Thanks!
 
A Ford "dually" is (or was the last time I checked) an F250 with dual wheels. Axles are the same except for brake drums. Different drums allow for inside dual to clear springs. A true "1-ton" will have a narrower frame, narrower springs, but twice as many of them. The "1-ton" is usually sold new as "cab and chassis ". Allowing for a variety of beds to be used.
 
This is very good to know. Thanks! I'll have to takeba look and see what I have exactly.
 
The frame is the same width, but the rear end is wider on a duelly,but you can run one wheel on the inside,just looks funny. There really is no reason you couldn't run one single on the outside. I never tried it, but a single rear rim might bolt up to the rear end,but duel wheels will not bolt up to a single rear end.BTDT
 
Mopower, Just take the duals off and put 3/4 ton wheels and tires on. To use 3/4 ton wheels on front unbolt the spacers from the rotors and use the 3/4 ton wheels on the front. Be sure to use the lug nuts for the 3/4 ton wheels. Simple huh?
 
It sounds like he wants to swap out the whole dually rear end for the F250 single rear end. Not put single tires/wheels on a dually axle.
 
I'd leave it as a dually. Chances are you will want to haul something heavy and the extra load rating of the duals will be needed. And if you pull a trailer the dually are all the much better for that too. I have ran both and it is amazing how much more overloaded you can run a dually and still feel stable.
 
The dual wheel pickup axle is wider to center the bearings between the two wheels whereas the single wheel axle has them centered on the one wheel. So, running a dually axle with only the inside tire will put additional stress on the bearings due to the offset load. In theory you could space the wheels out to center then on the bearings but they would then be too wide to fit in the fender wells of a pickup bed and would run in a different track than the front wheels.

Provided the dually truck is a pickup and not a cab-and-chassis then the frame width and spring location is the same as a single wheel pickup. C-and-C trucks have a narrower frame and rear axle that results in the front wheels running in between the dualed rears. Dually pickups have the inside rear wheels running in line with the front wheels.
 
Here she is.
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Yes, I sure feel the difference. It may wind up with a flatbed. After pricing the wide singles tires and wheels available that replace the duals, I have sticker shock. lol
 
(quoted from post at 21:17:09 10/06/16) Yes, I sure feel the difference. It may wind up with a flatbed. After pricing the wide singles tires and wheels available that replace the duals, I have sticker shock. lol

I replaced my pickup bed with a flat bed on my previous Ram Cummins. It looked neat, but you have to tie everything down on a flat bed or build sides.
 
No not quite. A 250 and 350 superduty single rear wheel only differ by springs and spacer block. 10.5" axle in the rear for srw. Dana axle in the dually pickup. Cab and chassis models usually a 10.5 but not always.

Pre-1998 or whenever they dropped the obs 350, you have a mish mash. Light 250 with semi-float 10.25 axle, heavy 250 with full float rear axle. 350 srw with 10.25" full float rear (narrow) also used on some 34" wide frame cab and chassis models in single and dual applications. The pickup duallys have a wider axle, I believe a Dana 60 in most of them, about 4" wider than the srw axle.

There a a few oddities around though, railroad service models, some with narrow 60's, etc. Lot of weird stuff.

A big problem with this info is people don't know how to ID axles. Parts counter guy at local ford dealer thinks superduties have a Dana 60/70 hybrid axle in the single rear wheel models.
 

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