Dana 60 to Dana 70 conversion possible?
#2006237
02/05/16 07:28 PM
02/05/16 07:28 PM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
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OP
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Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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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]
#2006340
02/05/16 10:36 PM
02/05/16 10:36 PM
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Joined: Jul 2008
Posts: 361 Canada
onig
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enthusiast
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Posts: 361
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
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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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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
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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 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: dvw]
#2007855
02/08/16 11:53 AM
02/08/16 11:53 AM
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Joined: Jan 2003
Posts: 13,319 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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Marion, South Carolina [><]
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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
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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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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
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Bend,OR USA
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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 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
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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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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Joined: Oct 2007
Posts: 3,978 Hilltown Pa
1967dartgt
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Hilltown Pa
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Why do you need to replace your Dana 60 housing?
Brett Miller W9 cnc'd heads STR Chassis fabraction
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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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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
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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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Joined: Dec 2003
Posts: 580 Boise Idaho
65coronet500
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mopar
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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!!!!
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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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Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
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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 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
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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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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Joined: Jan 2003
Posts: 13,319 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
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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
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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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Joined: Jan 2003
Posts: 8,843 poplar bluff mo.
toplescuda
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I Whine
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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
1970 barracuda convert. 1 of 59 1970 pro street A.A.R. clone (panther pink) 1971 charger 2015 hellcat challenger. Redline red 2014 quad cab 4x4 ram 8 speed hemi
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