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#2369773 - 09/12/17 09:42 PM Dana 70 DRW to SRW
themoparmanjc Offline
member

Registered: 08/16/15
Posts: 84
Loc: Wisconsin USA
Anyone know what is needed to convert a dually dana 70 to single rear wheel? It's in a 1990 W350 Cummins. I am swapping the drivetrain into my 85 w350 and I don't want a dually. I already have the front axle figured out. I have hubs from a front dana 60 srw. I was doing some research and some guys say the dually axle is shorter. In that case could I just run a wheel spacer?

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#2370485 - 09/13/17 11:17 PM Re: Dana 70 DRW to SRW [Re: themoparmanjc]
Mr. Smurf Offline
super stock

Registered: 03/08/07
Posts: 949
Loc: Mid Michigan
Bolt pattern & stud size is larger on the dualie....

No idea on width.

Ed

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#2370498 - 09/13/17 11:41 PM Re: Dana 70 DRW to SRW [Re: Mr. Smurf]
rhad Offline
mopar

Registered: 08/19/03
Posts: 656
Loc: garnett kansas
dually is narrower,and you may not have room to relocate the spring perches
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#2370633 - 09/14/17 10:17 AM Re: Dana 70 DRW to SRW [Re: themoparmanjc]
ruderunner Offline


Registered: 12/18/14
Posts: 1850
Loc: ohio
Depends on weather pickup dually or cab and chassis dually. More info on my lunch break but if cc axle just put single wheels on.

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#2370735 - 09/14/17 12:14 PM Re: Dana 70 DRW to SRW [Re: themoparmanjc]
ruderunner Offline


Registered: 12/18/14
Posts: 1850
Loc: ohio
Ok, back to it...

Spring perches are the same for all pickups. SRW axle is the narrowest of all three, cab and chassis DRW axle is about 3_4" wider, pickup DRW axle is about 3-4" wider than that.

Like I said if you have a cc axle, I've run them srw the rear tires come out and fill the wheel well, looks ok to me.
All 8 lug are 8*6.5 though dually do use 5/8" studs vs 1/2" for most srw.

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#2370755 - 09/14/17 01:00 PM Re: Dana 70 DRW to SRW [Re: themoparmanjc]
themoparmanjc Offline
member

Registered: 08/16/15
Posts: 84
Loc: Wisconsin USA
Thanks ruderunner

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#2370955 - 09/14/17 08:11 PM Re: Dana 70 DRW to SRW [Re: themoparmanjc]
kenworth_goose Offline
top fuel

Registered: 05/13/06
Posts: 1828
Loc: ky.
Dually rears are 2.5 inches wider per side. So 5 inch difference. Just find a set of single wheel hubs and use them. A cab and chassis rear end is the same width as the single wheel diffs if I remember right.

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#2370996 - 09/14/17 09:13 PM Re: Dana 70 DRW to SRW [Re: themoparmanjc]
themoparmanjc Offline
member

Registered: 08/16/15
Posts: 84
Loc: Wisconsin USA
I thought axle shafts are different lengths between srw and drw

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#2371352 - 09/15/17 04:22 PM Re: Dana 70 DRW to SRW [Re: themoparmanjc]
ruderunner Offline


Registered: 12/18/14
Posts: 1850
Loc: ohio
Need to know which dually axle you have.

Cc axle is wider than srw, just a couple inches though and nothing to fret about. Pickup dually is much wider than srw, the inner tires end up in the same place as srw tires.

Not sure about swapping hubs or shafts.

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