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04-23-2008, 06:26 AM
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#1 |
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Registered User
Join Date: Mar 2008
Location: Thousand Oaks Ca
Posts: 51
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Rear end options C20
I've got a '67 C20 with an Eaton rear end I believe, correct me if I'm wrong, and it is geared pretty high. I tried to count and I believe it is 4.56. Is there a bolt in swap where I could get 3.73's? A 12 bolt or a dana 60 from a later model I should look for?
Thanks! Tyler |
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04-23-2008, 09:12 AM
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#2 |
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Registered User
Join Date: Mar 2007
Location: Rapid City, South Dakota
Posts: 285
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Re: Rear end options C20
are you running a 12-bolt now?
you could change out the ring gearand pinion to 3.73 on most any diff.
__________________
,Clint LOUD PIPES SAVE LIVES  69 C-10 short stepside 406 sbc, 02 YAMAHA WR250F, 07 SUZUKI SV650S, 81 Grand Prix 355 sbc, 81 XT 500 YAMAHA |
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04-23-2008, 12:27 PM
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#3 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Rear end options C20
no, he has an eaton.
You have coils, or leafs, and do you have any cutting/welding abilitys? |
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04-23-2008, 01:02 PM
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#4 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,861
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Re: Rear end options C20
All Eaton HO52s are geared low.The highest gear is 4.10 and a rare 3.90 (not much better).I say high when the ratio is lower.A low gear is a high ratio.
A Dana60 from a GMC will go in pretty directly,maybe brake lines aren`t the same.The highest gear is 3.54. You can go with a 14-bolt from`73-up.What Longhorn Man was getting at is one shock mount will need moved as well as the spring saddles.If you have a coil rear you`ll also need to change spring saddles and the best bolt-in is that 3.54 Dana60,if you can find one.I guess you can still get a gear set and install in any GM Dana60 from these years.
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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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04-23-2008, 06:39 PM
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#5 |
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Registered User
Join Date: Mar 2008
Location: Thousand Oaks Ca
Posts: 51
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Re: Rear end options C20
Thanks for the replies. It's got coils and I have some welding ability but I was hoping for a bolt in since I don't have a shop yet and may not for at least a year. Did the GMC dana 60s have the coil springs as well?
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04-24-2008, 01:06 AM
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#6 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Rear end options C20
dana came in both chevy and GMC, and could be had in coil aplication (I have one under my C/20 coil burb with 3.54 gears and a posi)
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