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Old 03-04-2009, 10:17 PM   #1
Fitzgerald63
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Join Date: Mar 2009
Location: Apison Tennessee
Posts: 2
1963 c10 rear end

The spider gears recently went out in my 63 half ton truck rear end. The rear end is a factory GM 12 bolt from 1963 as far as i can tell. It has 3.73 gears and the 6 lug 17 spline axles.

My basic question is what guts from what years of trucks will fit in that year of housing? I have been told that they only made this style of rear from 63-65?

I am not opposed to switching everything to the 30 spline axle set up. I just don't know which ones if any will fit. I also plan on going posi as soon as i get the money, so which is easier to find posi for the 30 spline or the 17?

Any help or suggestions would be very appreciated. Thanks
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Old 03-06-2009, 02:19 AM   #2
Captainfab
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Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
Re: 1963 c10 rear end

If you're going to upgrade to a posi, then switching to 30 spline axles is the way to go. The parts from any pickup 12 bolt will fit the housing, but only the axles are the same thru '70.
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