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04-06-2004, 06:20 PM
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#1 |
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driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,714
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rear gears under 3.07?
Question: did the 12 bolt truck rears we have ever come with a ratio lower then 3.07? Like 2.76's or somthing?
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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04-06-2004, 06:26 PM
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#2 |
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www.73-87chevytrucks.com
 
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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You can get a 2.76 aftermarket. As far as I know GM only offered 3.08.
__________________
Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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04-06-2004, 09:03 PM
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#3 |
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Registered User
Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
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__________________
Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007 |
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04-07-2004, 02:38 AM
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#4 |
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driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,714
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Sweet. Thanks for the info.
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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04-07-2004, 02:39 AM
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#5 | |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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Quote:
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04-07-2004, 04:16 AM
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#6 | |
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Registered User
Join Date: Jul 2001
Location: Laughlin, Nv. USA
Posts: 700
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Quote:
and it has 2.76. |
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04-07-2004, 08:57 AM
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#7 |
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Registered User
Join Date: Jan 2003
Location: Washington State
Posts: 8,834
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Are there any charts like that with auto trans info...?
__________________
1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo |
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04-08-2004, 01:01 AM
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#8 |
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Registered User
Join Date: Sep 2003
Location: Shelbyville, Indiana
Posts: 614
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My 1980 K10 has a 12 bolt n it and it has 2:73 gears in it.
__________________
Chuck '85 Chevy Silverado 4X4  '91 Chevy 4X4 Suburban http://www.cardomain.com/memberpage/545941 |
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04-08-2004, 06:01 AM
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#9 |
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Registered User
Join Date: Jul 2001
Location: Laughlin, Nv. USA
Posts: 700
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Here is a list from the junkyard book for GM;
4x4, 2.56 ratio (opt GM8) 4x4, 2.73 ratio (opt GU2) 4x4, 3.08 ratio (opt GU4) 4x4, 3.42 ratio (opt GU6) 4x4, 3.73 ratio (opt GT4) 4x4, 4.11 ratio (opt GT5) 4x2, 10 bolt cover, 2.56 ratio (opt GM8) 4x2, 10 bolt cover, 2.73 ratio (opt GU2) 4x2, 10 bolt cover, 3.08 ratio (opt GU4) 4x2, 10 bolt cover, 3.42 ratio (opt GU6) 4x2, 10 bolt cover, 3.73 ratio (opt GT4) 4x2, 12 bolt cover, 2.56 ratio (opt GM8) 4x2, 12 bolt cover, 2.73 ratio (opt GU2) 4x2, 12 bolt cover, 3.08 ratio (opt GU4) 4x2, 12 bolt cover, 3.42 ratio (opt GU6) 4x2, 12 bolt cover, 3.73 ratio (opt GT4) 4x2, 12 bolt cover, 4.11 ratio (opt GT5) |
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04-08-2004, 05:58 PM
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#10 |
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driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,714
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2.56!! Wow! That would be a perfect gear with a 1:1 trans ratio for cruising.
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04-09-2004, 04:21 AM
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#11 | |
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LED King
Join Date: Jan 2003
Location: Sacramento, CA
Posts: 2,088
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Quote:
__________________
Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32 |
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04-09-2004, 11:53 AM
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#12 |
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Registered User
Join Date: Apr 2003
Location: New Mexico. Of all places for an Island boy.
Posts: 180
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My 79 Silverado (parts truck) came with a 12-bolt 2.76:1 ratio option# 1HG2
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