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Old 10-13-2003, 02:28 PM   #1 (permalink)
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Dana 70 help???

The axle is from an 85' F350, this is all I know for sure. I searched the Dana site and ran the BOM. The site does not tell me much, or atleast I don't know what to look for. The BOM is 605247-4, on the webbing it says, 70 1SU. Is this just a dana 70U and what does that mean?

Does it accept the regular d70 gears and locker choices?? How low is the gearing options? Thanks for the help, my ass is numb from searching for three hours.

Also, on the actual tag, the BOM says 605247-4 LS . I'm guessing it's for the limited slip?? I really need to know if I can still get a detroit and some 5.13 - 7. ???? on the gears.
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Old 10-15-2003, 09:39 PM   #2 (permalink)
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And I thought they were just putting in Sterlings then...
The LS is for limited slip, like you figured. No reason why you can't just stuff in that detroit and 5.13s. Same thing I run in my 70.
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Old 10-17-2003, 04:51 AM   #3 (permalink)
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70U

If it is a 70U, which it sounds like it is, then everything is the
same as a 70B except for the inner pinion bearing set. The cup is
the same as a 60 but the bearing has the same id as a regular
70, 70B, 70HD. So if your not going to replace pinion bearings
just consider it the same as a 70B. And if you need some inner
pinion bearings for a 70U let me know I've got some left over
after buying some gearsets for 70U to use in a 70B.

Gus
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Old 10-18-2003, 08:04 AM   #4 (permalink)
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Quote:
Originally posted by Proeliator
And I thought they were just putting in Sterlings then...
Mid 85 is the changeover. I suspect a build date around 1/85 is when it changed. Early 85's run the d70. I also suspect they went to the later design 6.9 block at the same time.
-John
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Old 10-18-2003, 06:11 PM   #5 (permalink)
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Thanks for the info guys! Looks like this should be a pretty damn stout axle for a 4500 lb. buggy.
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Old 10-19-2003, 10:03 AM   #6 (permalink)
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My buddy's 85 F250 (supercab diesel) came with a Dana 70 as well. He swapped in gears from an 80's Chevy cube van (G-series, DRW, cutaway). How's that for interchange?
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Old 10-20-2003, 05:31 PM   #7 (permalink)
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I just swapped in this 85 D70 from a diesel utility body SRW it's very stout
http://www.superford.org/registry/ve...a.php?id=86579
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Old 10-21-2003, 08:38 AM   #8 (permalink)
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Nice pics Bill! That is a sweet looking F150 you got there. Nice to get rid of that TTB crap, huh? Yall got some serious rust out der.
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Old 10-22-2003, 05:06 PM   #9 (permalink)
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Yeah solid axle was the only way to go! We get lots of snow up here
http://www.superford.org/registry/ve...a.php?id=80916
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Old 10-22-2003, 11:08 PM   #10 (permalink)
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The 10.25 was not used in all diesel applications from 85 on, I had an 85 diesel 250 parts truck with a 10.25, but, my 86 F350 Crew Cab 4x4 SRW has a D60 front/70 Rear. From what I have seen, the early post 10.25 high GVWR diesel applications still used dana axles.
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