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Old 12-13-2005, 12:32 PM
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Rear end gears

I own a 69 Chevy 1/2 ton long bed pick-up. It has 6 lugs with a drum brake system. I was wondering if it is possible to convert my existing rear end to a positraction rear end with out having to change the entire rear end?

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69 chevy time

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Last edited by 69chevytime; 12-13-2005 at 01:13 PM.
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Old 12-13-2005, 12:47 PM
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Sure.....positraction rearends were available in 69. You just have to find the right parts. It's not a job for an amateur, though.
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Old 12-13-2005, 01:05 PM
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rear end gears

Thanks for the reply. I guess I will have to go searching for a positraction rear end then. I was not aware of that. I was thinking that I could buy a kit to get the desired results, I guess i can get a phone book insted and start calling.

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69chevytime

Last edited by 69chevytime; 12-13-2005 at 01:13 PM.
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Old 12-13-2005, 05:10 PM
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Only problem is you`ll most likely find gov-lock type posi rearends... You will end up wasting time and money... Inline with what Poncho62 said just buy the parts and have a reliable person rebuild your rearend with the right stuff and it will last...
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Old 12-13-2005, 11:13 PM
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Your truck should have a 12-bolt truck-type rear end, which can NOT use internal parts from a car-type 12-bolt. You should be able to find a used posi unit, or you can buy a new one made by Eaton or Auburn, etc. If you don't want to change gear ratios, you can just swap the new posi carrier with your old non-posi carrier, but like poncho62 said, it's not a job for an amateur.

You'll need to know your current gear ratio so you can buy the correct "series" posi carrier. It has to do with the position of the ring gear flange in relation to the centerline of the pinion gear. Different ranges of gear ratios used a different series carrier.

The carrier is removed, and the ring gear is swapped onto the new carrier. The new one is then installed, but you have to adjust the gear backlash, which is the part that requires specialized knowledge & tools.

Here's a pic of the Gov-lock, so you'll know what to avoid like the plague:


The good posi's have a flat, S-shaped spring inside, or 4 or 5 coil springs between two thin metal plates.
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Old 12-14-2005, 02:13 PM
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Rear end gears

Thank you all for the helpful comments.

God Bless
69chevytime
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