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Dana 60 to Dana 70 conversion possible? #2006237
02/05/16 07:28 PM
02/05/16 07:28 PM
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Charlotte, North Carolina
sgcuda Offline OP
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So, a local shop gave me a Ford Dana 70 floater truck rear end for helping them out from time to time. It has 4.10 gears and 3.5 axle tubes. Axle spline count is 32. Does anyone make a spool for a D70 with 35 splines so I could reuse my Moser axle shafts, and are there 3.5" axle flanges available for the passenger car bolt patterns. I am guessing I wouldn't have to worry about pro or street gears with a 10.5" ring gear.


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Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006254
02/05/16 07:45 PM
02/05/16 07:45 PM
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I have looked before for one but was unable to locate one, that has been a while ago so things may have changed..

Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006259
02/05/16 07:56 PM
02/05/16 07:56 PM
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Canada
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east coast gear supply lists a dana 70 spool, but the description says its a dana 80 spool with the conversion parts to make it work in a 70. Takes the same 70 ring gear and 35 spline axles

Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006340
02/05/16 10:36 PM
02/05/16 10:36 PM
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Canada
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Guys have put 70 gears in a 60 housing (if that is what you are asking). Some grinding is required for the crown gear to fit and possibly different side carrier bearings will be needed. If you google the net you should find how to do it. I came across it a couple of times doing a search.


69 Dart
Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006350
02/05/16 10:50 PM
02/05/16 10:50 PM
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Charlotte, North Carolina
sgcuda Offline OP
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Just trying to make the 70 work on its own. Already have a set of 35 spline axles out of my 60.


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Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006501
02/06/16 02:33 AM
02/06/16 02:33 AM
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Hot Rod Ridge
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I'm sure Moser would make a custom spool if you need one.
I would call them and ask a tech guy, there pretty good

Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006583
02/06/16 09:34 AM
02/06/16 09:34 AM
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The Shadow Offline
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I personally think the weight to strength difference isn't worth it.
What does it weigh? 300lbs
Are you breaking 60's?
I dont imagine a lot of gear selection

Re: Dana 60 to Dana 70 conversion possible? [Re: The Shadow] #2006590
02/06/16 10:07 AM
02/06/16 10:07 AM
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Charlotte, North Carolina
sgcuda Offline OP
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Originally Posted By The Stig Jr
I personally think the weight to strength difference isn't worth it.
What does it weigh? 300lbs
Are you breaking 60's?
I dont imagine a lot of gear selection


The ring gear diameter is 10.5" vs a D60 that is 9.75". Strength is much higher in a 70 than a 60. Haven't weighed both housings yet, but I don't see the 70 being that much of an overwhelming increase. Yeah, it was real heavy, until I pulled the hubs, rotors, axles out. I will weigh it after I cut it to proper length, for comparison. I'm not breaking anything, but I need to replace my existing housing and am checking different options. Gear ratio's are available from 4.10 up to 7.17. I don't think a "Pro" style gear will be necessary.


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Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006632
02/06/16 12:09 PM
02/06/16 12:09 PM
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I'd sell it to a truck guy and buy the Dana 60 parts I need.

Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006865
02/06/16 06:20 PM
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I agree...........a 60 is heavy enough, why put a "tank" differential in a race car, or any car for that matter

Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2006876
02/06/16 06:49 PM
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Canada
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Or do the Jana 76 conversion if you're after the strength increase. It's where you put the 70 ring and pinion in a 60 housing

Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2007025
02/06/16 10:53 PM
02/06/16 10:53 PM
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If you can put a 70 gear in a 60 can't you put a 60 gear in a 70? That being said junkyard 60s are pretty easy to come by. I personally wouldn't bother with the extra weight and 3 1/2" tubes.
Doug

Re: Dana 60 to Dana 70 conversion possible? [Re: dvw] #2007855
02/08/16 11:53 AM
02/08/16 11:53 AM
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Marion, South Carolina [><]
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Originally Posted By dvw
junkyard 60s are pretty easy to come by. I personally wouldn't bother with the extra weight and 3 1/2" tubes.
Doug

iagree iagree iagree


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2007923
02/08/16 02:26 PM
02/08/16 02:26 PM
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I ended up owning the Dana 70 Mopar made and gave to John Deianna(SP?) that was for his old Duster modified production car, that rascal was really heavy with all the stock brakes on it. It did have a posi in it, not a spool so there is some weight there but there is no way I would do that agian. He got it due to using destroke small C.I. 340 motors that they RPM the crap out of back then, early to mid 1970, he had rear gear ratio from 5.86 to 7.50 that Mopar sent him shock shruggy there are two different ring gear offsets in the stock Dana 70 depending on year and application so be careful on selecting a part number on gears for the housing you get, if you decide to use one work


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Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2008009
02/08/16 05:00 PM
02/08/16 05:00 PM
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Hilltown Pa
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Why do you need to replace your Dana 60 housing?


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Re: Dana 60 to Dana 70 conversion possible? [Re: 1967dartgt] #2008214
02/08/16 10:27 PM
02/08/16 10:27 PM
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Charlotte, North Carolina
sgcuda Offline OP
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Originally Posted By 1967dartgt
Why do you need to replace your Dana 60 housing?


Changing ladder bars and brackets. Too much hardware on old housing to remove (ladder bar brackets, shock brackets, wheelie bar brackets). New brackets are a full wrap over the axle tubes, like a four link bracket. Tubes are already bowed, bearing ends have been offset welded to compensate. Car is going to be a lot faster, so I would feel better having a solid foundation to start with.


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Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2008394
02/09/16 02:47 AM
02/09/16 02:47 AM
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Boise Idaho
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To The best of my Knowledge most companies that make 4 link or ladder bar brackets usually only make up to 3 1/8 tube radius or smaller so alot of grinding for very little advantage .
To Be frank i have done rearends for 25 years and have honestly seen more broken Dana 70s than 60s in the pickups they came in originally!
Usually the reason is that the inner pinion race spins in the housing and allows the pinion gear to deflect till they break
I Would just use a 60 and live a happy life without complications of the 70 Good Luck Matt


All steel 3800 lbs with me in it 65 Coronet 451 CID Indy 440-1 heads by Dwayne Porter racing heads .
..... 10.31 @ 129.4 mph 1.40 60 ft ALL MOTOR!!!!
Re: Dana 60 to Dana 70 conversion possible? [Re: WO23Coronet] #2008405
02/09/16 03:28 AM
02/09/16 03:28 AM
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Utah and Alaska
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use the 70 as is, its only about 10# more than a 60 if the tubes are 3.5" the same if the tubes are the same size. I did the 76 conversion, it was a fun project but I should have stuck with a plain 70...Tim

Originally Posted By WO23Coronet
Or do the Jana 76 conversion if you're after the strength increase. It's where you put the 70 ring and pinion in a 60 housing


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Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2008459
02/09/16 11:32 AM
02/09/16 11:32 AM
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Marion, South Carolina [><]
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If the housing and tubes are flexing bad enough that you need a new one, you should be putting a 9" Ford under the car. At the very least use a backbraced factory housing, but you should really look into a fab 9 housing.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Dana 60 to Dana 70 conversion possible? [Re: sgcuda] #2008739
02/09/16 07:29 PM
02/09/16 07:29 PM
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I asked on here a couple years ago...I had a dana 70. And I had ask right here in this four months. If I could put dana 60 parts into a dana 70 housing. And 2as told no. So I pitched it


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