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Old 10-18-2012, 09:43 AM   #1
77c10
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Can someone help identify this?

This came with my truck when I bought it and I don't plan to use it. Looking to sale it on Craigslist and was hoping someone could give me the details about it.







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77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint

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Old 10-18-2012, 09:44 AM   #2
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Re: Can someone help identify this?

Not sure what I am doing wrong on the link. I can't access Photobucket from my work due to internet restrictions so I am typing in the link from my phone.
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77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint

"Cool ain't ever cheap and cheap ain't ever cool"
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Old 10-18-2012, 11:22 AM   #3
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Re: Can someone help identify this?







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77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint

"Cool ain't ever cheap and cheap ain't ever cool"
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Old 10-18-2012, 11:26 AM   #4
J Knight
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Re: Can someone help identify this?

It's a GM posi carrier. Not sure what it came out of though.
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Old 10-18-2012, 11:30 AM   #5
bigwheel15
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Re: Can someone help identify this?

Thats a posi unit, looks like an eaton or possibly a gov-lock. Someone will chime in with the specifics for you.
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Old 10-18-2012, 09:15 PM   #6
superwade57
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Re: Can someone help identify this?

i could be wrong but in my experience the gov loc has clutch discs that looks like could be an eaton style g80 looks pretty good size? how many bolt?
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Old 10-18-2012, 09:28 PM   #7
77c10
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Re: Can someone help identify this?

Quote:
Originally Posted by superwade57 View Post
i could be wrong but in my experience the gov loc has clutch discs that looks like could be an eaton style g80 looks pretty good size? how many bolt?
It is a 12 bolt and has 30 splines.
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77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint

"Cool ain't ever cheap and cheap ain't ever cool"
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Old 10-18-2012, 09:36 PM   #8
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Re: Can someone help identify this?

It's a eaton, it has clutch discs in behind the spider gears.
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Old 10-18-2012, 10:08 PM   #9
77c10
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Re: Can someone help identify this?

How can I tell if it is a truck or car unit and what gear range it is for?
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77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint

"Cool ain't ever cheap and cheap ain't ever cool"
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Old 10-19-2012, 01:01 AM   #10
406 Q-ship
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Re: Can someone help identify this?

That looks like a passenger car 12 Posi, quite possibly a series 2 (fits 2.29 to 2.73 gear set)
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