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07-28-2013, 08:59 PM
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#1 |
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Registered User
Join Date: Jan 2001
Location: McKeesport, PA
Posts: 123
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3/4 ton gear ratio
Does any know if 3.73:1 gear ratio was available in 1967 3/4 ton rear ends? Or if they are available in after market products? Any help would be appreciated.
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07-28-2013, 10:32 PM
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#2 |
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I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: 3/4 ton gear ratio
I'm pretty sure 4.10 is the highest gear in Eaton rearends.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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07-28-2013, 11:34 PM
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#3 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 3/4 ton gear ratio
The Eaton HO52(5200) is going to be 4.57 or the optional 4.10. In 68 they offered a Dana 60 in 3.54 (big block trucks) that continued with the later trucks. If you are running an Eaton 4.10 is really as good as it gets. Bigger tires, an O/D or O/D transmission and a factory Dana 60 swap would all be good alternates. If you don't mind fab work a 14 bolt could also be used.
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Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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07-28-2013, 11:39 PM
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#4 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: 3/4 ton gear ratio
As mentioned,no 3.73s were available. To get 3.73s you either need a 14-bolt or a Ford Dana60. BBC automatics came with 3.54s in a Dana60
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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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07-29-2013, 02:58 AM
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#5 |
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Learning As I Go
Join Date: Feb 2009
Location: scotts valley california
Posts: 250
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Re: 3/4 ton gear ratio
do dana 60's come in these trucks with coils?
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1972 Chevy C-20 Longbed 2wd Granny Low with a Crate 350: Air Gap Manifold, Edelbrock 600cfm, HEI, Headers to a 40 series flow (soon to be dual again) |
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07-29-2013, 04:10 AM
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#6 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 3/4 ton gear ratio
Dana 60 axles were offered as optional equipment with leaf or coil springs on some 68-72 CK10-CK25 trucks, mostly with HD springs or big block manual applications. If you want the BOM numbers, download Dana Spicer's X510-8 that can be downloaded here.
www2.dana.com/pdf/X510-8DSD.pdf
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Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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