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#1
10-13-2020, 11:54 PM
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12 Bolt Posi GM Eaton 3 Series Unit //3.31 Gears Chevelle Camaro
12 Bolt GM Eaton 3 series Posi Unit with 3.31 Gears
3 Series 30 spline Posi Unit EDB 30140 The ring has nothing stamped on it. The Pinion gear has 3862693 13-43 GM stamped on it. This 3 series unit and gears were removed from my 1970 chevelle LS6 with documented 41,000 miles in the registry. These were factory gears that were original to the car. I installed a set of 410's instead. The car is long sold. Everything was working fine when removed and no damage. Looking back I should have just left the original gears in and never removed them. All pieces are there for a complete switch over. $500 usd + shipping 
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#2
10-14-2020, 01:47 AM
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The ring gear will be marked on the mating surface. You will have to remove it to find the markings.
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Freddie 1969 Camaro RS/SS396 (427) 4 speed
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#3
10-14-2020, 03:39 PM
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Ken PM Sent
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"NOSTALGIA It takes us to a place were we ache to go again"
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