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01-01-2011, 05:03 PM
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#1 |
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Enjoying left field
Join Date: Jun 2008
Location: Dillon Montana
Posts: 900
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posi ID
Hey guys,
I found a 1/2t rear end out of an 86 or 89 that is a 3.73 and a factory posi. Will it bolt in to my 70 K10? What kind of posi is it? It doesn't look like the gov-lock I used to have. 
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01-01-2011, 07:09 PM
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#2 | |
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just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: posi ID
Are you talking about the whole housing? or just the carrier?
If it is the housing, I would say that you are as well equipped to asnwer that as anyone else. You need to measure the over-all length drum to drum and then check the spring pad spacing....after that may depend upon your fab-skills. If the length is close, you might still have to move spring mounts and/or shock mounts. As far as the "posi", it looks like a typical clutch type unit, but I don't recognize that spring right off. Eaton units have a pair of flat plates with coil springs. The only thing I have ever seen with a flat S-curve spring like that was Ford?
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Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. 
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01-01-2011, 08:34 PM
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#3 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,728
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Re: posi ID
The S spring clutch type limited slip is common to the 8.5" 10 bolts. That's what a Camaro/Firebird posi looks like from '71-'81. I have seen them with 28 spline axles, but never in the 30 spline ones. It is a good, strong, rebuildable unit. But that is not just a "bolt-in" for an earlier truck. Will need spring perches & shock mounts re-welded and possibly an adapter u-joint depending on the yoke style used.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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01-03-2011, 03:49 AM
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#4 |
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Enjoying left field
Join Date: Jun 2008
Location: Dillon Montana
Posts: 900
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Re: posi ID
Do you think its worth $250? Moving perches and shock tabs isn't a big deal.
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01-26-2011, 12:59 AM
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#5 |
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Registered User
Join Date: Dec 2010
Location: sioux city, iowa
Posts: 619
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Re: posi ID
Do you think its worth $250? Maybe in idaho. $150 in Iowa.
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01-27-2011, 05:08 AM
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#6 |
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Registered User
Join Date: Aug 2010
Location: Lost Wages, NV
Posts: 201
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Re: posi ID
If YOU think it's worth it ... I say buy it!
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1968 K10/30 Frame Off Project "Overkill" My 5 year, $30,000.00 toy |
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01-27-2011, 05:41 PM
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#7 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: posi ID
I'd say a complete rear with posi is worth $250. What ratio is it? Does it match what you have?
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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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01-29-2011, 11:42 PM
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#8 |
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Enjoying left field
Join Date: Jun 2008
Location: Dillon Montana
Posts: 900
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Re: posi ID
I decided to put the search for 3.73 posi rear end on the backburner and started looking for a frame since mine is beat to hell and has a hideous bumper welded on the front. I found a 69 c10 with a descent bed and nose for $250. Today I pulled the cover off the rear end and guess what I found.
[IMG]  [/IMG]A 3.73 posi  am I seeing that right? That is a posi right? Any idea what kind?Posted via Mobile Device Posted via Mobile Device |
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01-30-2011, 12:04 PM
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#9 |
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Enjoying left field
Join Date: Jun 2008
Location: Dillon Montana
Posts: 900
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Re: posi ID
Anybody familiar with these units? Any issues? Are the rebuildable?
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01-30-2011, 07:49 PM
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#10 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,728
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Re: posi ID
That is the factory Eaton style posi-traction, and it is completely rebuildable. Although parts are expensive. I put new clutch plates in one of mine, but chances are it will be OK as is for now.
That S spring posi is also rebuildable, and $250 was not unreasonable IMO if it was in good shape.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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