making dually
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=152808
Printed Date: 07 May 2025 at 6:29pm
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Topic: making dually
Posted By: LouSWPA
Subject: making dually
Date Posted: 07 Aug 2018 at 7:28am
2000 F350, I was told that all I need to do to make this a dually is longer wheel studs and add wheel. does anyone know the proper stud length and what wheels to use? currently it has factory alloy wheels.
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Replies:
Posted By: Dakota Dave
Date Posted: 07 Aug 2018 at 7:36am
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I've never made a F350 into a dually but on the older Chevy trucks a dual wheel won't fit the axle is to short unless it's a cab and chassis. Cab and chassis frames are narrower than pickup frames. My old Chevy has dual wheel spacers on the axle then duals installed.
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Posted By: TDF
Date Posted: 07 Aug 2018 at 8:09am
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Never tried it on a 2000, but did try it on a 1995 and there wasn't clearance for the frame to the inner wheel.You may end up with dual wheels on the back of your F350, but you won't have a true F350 Dually, as the Dually uses the Dana 80 rear end, whereas the single rear wheel F350 uses the Sterling 10.5. Which is the same rear end that is used in the 1999 and up F250 super duty. TDF
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Posted By: Dakota Dave
Date Posted: 07 Aug 2018 at 8:13am
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A standard 16x8 dually wheel dishes in 10" from the hub face. On a pickup this puts the tire and the inner fender well in the same place that's why dually pickups have a wider track than stake bed trucks. Stake beds use the same axle as a pickup. Dually pickups have a 6" longer axle. If you want to run the same tires on the front you'll need dually wheel spacers in the front also. Or the dually tire will be occupying the same space as your front suspension it'll work till you try and go around a corner. You can keep the stock wheels in the front. It's just meanes you'll need two differant spares. If your trailer spare is the same as the truck your ok
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Posted By: john(MI)
Date Posted: 07 Aug 2018 at 9:18am
It really is an easy job. Trade that road dumpster in and buy a GM dually. I hate to say it but a friend recently bought a Dodge 1 ton single tire that runs and rides real nice. Maybe it ain't so bad cause it has a Cummins engine rather than a Dodge engine! So I suppose a dually would be the same. He didn't want a dually because they don't fit in a car wash. He lives in the trailer he pulls with it, so he doesn't have washing facilities!
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D14, D17, 5020, 612H, CASE 446
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Posted By: Walker
Date Posted: 07 Aug 2018 at 2:50pm
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Years and years ago JC Whitney had kits to do that with everything in them. I don't even know if Whitney still exists or not but would be worth a look.
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Posted By: shameless dude
Date Posted: 07 Aug 2018 at 3:43pm
Posted By: shameless dude
Date Posted: 07 Aug 2018 at 3:48pm
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what ever you do, you'll hafta either cut out the inner wheel wells or cut out the outter fenders, normally the dually rear ends are shorter in width than the single wheel versions. any truck shop can get you the specs for the studs. I've always wanted to re-do one of my suburbans into a dually ever since I saw 2 of them in Omaha. maybe someday! i'm also sure you'll hafta move your springs and mounts too
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Posted By: JoeM(GA)
Date Posted: 07 Aug 2018 at 3:51pm
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https://www.southwestwheel.com/c-1040-eight-hole-ford-single-to-dual-wheel-adapter.aspx" rel="nofollow - https://www.southwestwheel.com/c-1040-eight-hole-ford-single-to-dual-wheel-adapter.aspx
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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB
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Posted By: LouSWPA
Date Posted: 07 Aug 2018 at 4:49pm
well, the sheet metal is a nonproblem, it's pretty much rotted away, the bed has to come off and I was thinking of building a wood flat bed on it. replacement beds are simply too expensive.
looks like converting to a dually would be more expensive and/or complicated than I thought.
appreciate the help
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Posted By: DMiller
Date Posted: 07 Aug 2018 at 7:16pm
As noted the wheels are a bolt on, same thread count an diameter studs, same length, Dual Wheels had a aligning pin at one time for the two wheels to mate properly. HOWEVER as noted the Single wheel Axle housing is narrower, may have wheel to spring clearance issue as well if leave the OE style bed on wheel well interference. Change to a farm style or flat bed and good in that respect but NOT to the springs. Rear hubs are identical to dually, front hubs are of course different and interchange on the SD with no mods.
I own a 99 SD F250, same same only different numbers.
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Posted By: Brian Jasper co. Ia
Date Posted: 07 Aug 2018 at 8:29pm
The front hub/bearing and brake rotor are the same dually vs single rear on a 4x4. The budd style wheel adapter is the only difference. The frames are different between a truck outfitted as a pickup from the factory vs a chassis cab unit. A dually rear ring gear is larger than a single wheel whether it's a Sterling, Ford, or Dana. As easy as a salvage dually axle would be to find, I wouldn't even think about some sort of mickey mouse adapters that won't give you any more weight capacity.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Posted By: HD6GTOM
Date Posted: 07 Aug 2018 at 9:27pm
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Lou, I did a few of those when I had my tire shop. It is not as simple as that. You need a spacer that bolts on to the hub and then the dual wheels bolt to the spacer. I got the kits from one of our local tire suppliers, but they got bought out and no longer handle stuff like that.
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Posted By: truckerfarmer
Date Posted: 07 Aug 2018 at 9:59pm
Actually on a GM all the frames are the same width. It's the width of the rear axle that varies. In fact I believe the industry standard is the same frame width for all brands. Otherwise aftermarket manufacturing of beds would be almost impossible.
DANA made more than just the 80 in dually versions. Had an 80 go bad in my '78 Chevy. Couldn't find one, ended putting in a 70. I believe they also made a lighter duty 60 in the dually configuration. There is also 2 different widths of dually rearends. Narrow is for cab chassis configuration, for flatbeds and utility boxes. The wider on is for pickups with factory OEM boxes so ad to maintain standard width between inner fenders and box rails.
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