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#1 |
Coast 2 Coast in 61 mins.
Join Date: Jul 2004
Location: Canton, Illinois
Posts: 33
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Dana 60 Question
My 69 C20 has a Dana 60 in it, my question is concerning the 8 lug axles. Were there any 5 lug axles made for this rig? I'm also concerned about the 4.56 screw being a little bit to low for a big block. Any thoughts?
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69 C20 71 C10 40 over 454, AT, 3.08 gears 71 Demon 340, 4spd, 4.56 gears 70 RoadRunner 440 6pack, 4spd, 4.10 gears 99 Dakota R/T 360, AT, 3.91 gears ![]() |
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#2 |
Bite me, import boy
Join Date: Apr 2005
Location: Eagle Point, Oregon
Posts: 102
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There were no GM Dana 60 applications with a 5 lug bolt pattern. Some Ford, Jeep and IH's had flanged axle 60's with 5 on 5.5. And there were a few Chrysler muscle cars that had 60's with a 5 on 4.5" bolt pattern.
I would say that 4.56's will be too low if you are planning on much highway driving. With 31" tires, your cruise RPM at 60 mph is going to be almost 3K. Depending on how much you plan on towing or hauling with it, I would think that a better ratio for all around performance would be around 3.54- 3.73. Jason
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Jason '71 C-10 Deluxe-under construction '69 C20, 396,T400-donor truck, '65 C10 project "Facts are meaningless, You can use facts to prove anything that's even remotely true." |
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#3 |
huh ???
Join Date: Nov 2002
Location: Fredericksburg,Va.
Posts: 3,369
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Your Dana 60 is like mine, it's a full floating axel. Basicly the wheel bolts up to the brake drum. The axel shaft has nothing to do with the bolt pattern. The easiest way to get a 5 lug is to swam in a 12 bolt axel...
Chuck
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90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!" |
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#4 |
"Ochre Ogre"
Join Date: Apr 2000
Location: Springfield, MN
Posts: 3,558
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The other gear ratios you have available in a dana 60 are 3.54 and 4.11. I would try to find the 3.54's if I were you.
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Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087 |
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#5 |
Senior Member
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Location: Colfax-California
Posts: 8,553
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There are chevy 5 lug 60s but they are a semi float. This was recently discussed on this board. With the big block you will want the 3.54 gears.
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#6 |
A$$ deep into trucks
Join Date: Dec 2002
Location: Central Illinois,USA
Posts: 249
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There weren't any 5-lug Dana 60's made for our trucks that I'm aware of, but some big block equipped '68-'69 Chevy 1/2 tons came with Dana 60 semi floating 6-lug rear ends.
Few and far between, and most were setup for coil spring suspension. If your truck is leaf sprung, you have a better chance of finding a bolt in D-60 semi floating rear in '69 and earlier GMC 1/2 ton trucks. They will all be 6-lug, but the axles can be re-drilled for 5 on 5, I think. Like da-burb said you can get 4:11, 3:54, and 3:73, I believe. Better yet, a 12-bolt slides right in, has 3:07 (3:08), 3:42, 3:73, 4:11 (4:10) gear choices, 5 on 5 axles, two size brake options, and they're EVERYWHERE. A big block should be happy with either the 3:54's, or the 3:42's for an all around dual purpose truck.
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hardrock2 |
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#7 | |
Bite me, import boy
Join Date: Apr 2005
Location: Eagle Point, Oregon
Posts: 102
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Quote:
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Jason '71 C-10 Deluxe-under construction '69 C20, 396,T400-donor truck, '65 C10 project "Facts are meaningless, You can use facts to prove anything that's even remotely true." |
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#8 |
A$$ deep into trucks
Join Date: Dec 2002
Location: Central Illinois,USA
Posts: 249
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Whoops, my mistake. Those are Dana 44's in the '69 and back GMC's. (just went and looked under a '68)
Something stuck in my head that the big block 1/2 ton trucks in '68 and '69 could have had D-60 6-lug rears when optioned with the HD rear. I've had a few over the years and always assumed they were D-60's, not ever imagining GM would stick a little 44 under a 396/402 motored truck and call it HD. Sorry 'bout that! (blush)
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hardrock2 |
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#9 |
Young Gun wth Fast Inline
Join Date: Jan 2002
Location: Idaho
Posts: 1,475
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GM did both. They most certainly had a d60 6 lug semi floater in the 1/2 tons. I cant say if it was a big block only thing or not, but I seem to remember they were more apt to be put in a truck designated as a 'GMC'.
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1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!! |
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#10 |
Coast 2 Coast in 61 mins.
Join Date: Jul 2004
Location: Canton, Illinois
Posts: 33
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Many thanks for the info, I've decided to use the c10 rolling chassis, 12 bolt with 3.08 gears, 5 on 5 bolt circle. Anyone want to buy a Dana 60.....LOL
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69 C20 71 C10 40 over 454, AT, 3.08 gears 71 Demon 340, 4spd, 4.56 gears 70 RoadRunner 440 6pack, 4spd, 4.10 gears 99 Dakota R/T 360, AT, 3.91 gears ![]() |
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#11 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Check markwilliams.com,that`s what I`m going to do with my shortbed.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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