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10-15-2012, 07:16 PM
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#1 |
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Registered User
Join Date: Aug 2011
Location: Patterson California
Posts: 1,133
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Rear differential question
I need to know what year chevy truck would have had a posi differential in it? 5 lug with 373 gears any one know?
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10-15-2012, 07:58 PM
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#2 |
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Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: Rear differential question
My 68 has the 373 posi from the factory.
Oops,mine is 6 lug! Mike. 
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10-15-2012, 11:14 PM
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#3 |
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Registered User
Join Date: Oct 2012
Location: South Haven, MN
Posts: 109
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Re: Rear differential question
i know my step dads 73 suburban had posi not sure on the gears though, but i know our 89 sub had 3.73 posi i dont know if that helps you at all but i figured i would give my 2 cents
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10-16-2012, 12:50 AM
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#4 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,250
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Re: Rear differential question
There isn't any specific year or model of truck that will definitely have 3.73's and a posi. It just depends on what options a truck was ordered with. It's just a matter of searching and either checking build code stampings or pulling covers.
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10-16-2012, 07:57 AM
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#5 |
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Registered User
Join Date: Nov 2011
Location: powhatan virginia
Posts: 402
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Re: Rear differential question
5 lugs were usually 2wd trucks 71 and newer. Look for factory towing package as most of them were 373.
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