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03-29-2007, 01:50 AM
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#1 |
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Registered User
Join Date: Dec 2006
Location: Mississippi/Georgia
Posts: 32
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posi code
does anyone know the code for a factory posi in the 73-87's? i'm headed out to the junkyard this weekend to find a posi rear end, hopefully i will get a chance to look through all of the trucks, but what are some ways to tell if its an posi without taking the cover off the rear end?
Last edited by sbc406c10; 03-29-2007 at 01:50 AM. |
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03-29-2007, 11:11 AM
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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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Re: posi code
With the trucks as old as they are there is no way to tell if it is a LSD without removing the cover.
G80 is the option code for them though. In general, the 12bolts have the Eaton clutch style unit, and the 10bolts have the Eaton Gov-Loc.
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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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03-29-2007, 11:16 AM
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#3 |
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The Crazy Machanic
Join Date: Jan 2007
Location: Nokesville Va
Posts: 1,437
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Re: posi code
I was told to jack it up and turn the wheel and if the other wheel turn, In th same direction its a posi. BUt i could be wrong been so long sents iv been told that.
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*1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day)  * 1970 chevelle 2dr sedan Latest update June 24 2007.  *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad)  newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one
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03-29-2007, 11:25 AM
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#4 |
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www.73-87chevytrucks.com
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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Re: posi code
If the unit is tight and it is a clutch setup that "could" be fairly accurate, but it the clutches are worn, it will act like an open diff.
The test won't work on a gov-loc though, it uses flyweights to engage, so it will always act like an open until it senses slip.
__________________
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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03-29-2007, 12:23 PM
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#5 |
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Registered User
Join Date: Dec 2006
Location: Mississippi/Georgia
Posts: 32
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Re: posi code
ok, thanks a lot guys for the info
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