'64 rear axle update info needed

We are trying to repair/replace the rear in a 64 1/2 ton with a 12 bolt rear and a series 4 carrier (crown?) The pinion gears have eaten into the housing. We would like to
simply replace the carrier but, we seem to have 17 spline axles which were only used for a couple of model years. The info we have indicates we need 30 spline axles in order to buy a replacement carrier of most any type. The big question is - where do we look for 30 spline axles in other later model trucks so that we can use the old axle housing. If that cannot be reasonable accomplished, does anyone know in which vehicles would we need to look to find a complete axle of the correct width. So far, I have not been able to find a list of GM axle widths to help in tracking down a donor vehicle. Any help along these lines would be greatly appreciated.
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Ask Randy at www.ring-pinion.com

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Thanbks for the reply. Tried Randy and a bunch of others. They can only provide new custom axles and recommend I follow this route. Again, problem is 17 spline axles for which no carriers are available without getting lucky at the bone yard. I need 30 spline axles of the correct length to replace the 17's in order to replace the carrier or, a correct length complete axle assembly. Which vehicle's are likely to have this?
On Mon, 14 Jul 2003 05:33:34 -0400, "Tim Long"

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You need to measure the axle you have if you want to find a newer unit to fit. You need the axle width from flange to flange, the distance between the spring perches,type of spring and bolt pattern of the current wheels and what size brakes you have. Post this info and I'll look up the specs for a newer unit that will fit. The only other way would be to have 28 or 30 spline axles cut to fit and then fit a new carrier, OR you could take the current carrier and have it welded up and machined back to stock or to fit 28/30 spline pinions and bearings. Lots of options but your decision on what to do.
Steve W.
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Thanks, Steve. I finally got back over to the truck to measure the axles. They are 30 3/4", 17 spline with 6 lugs w/o the lugs. We need the 30 3/4", 30 spline with 6 lugs. This project is for my brother in law who is unwilling to write a blank check and is looking for the least expensive route. I have heard of welding the carrier and re-machining but, the cost of that around here is more than an Auburn posi carrier. That is why we are looking for replacement axles to just use the Auburn unit or a good used stock one if we happen to find a 12 bolt unit in good condition. This project has nothing to do with restoration but, rather replacing/repairing a dead unit behind a healthy 400 sbc in this truck for a driver who would do as well with a 235. If you have any idea where these axles may be cannabalized, we would greatly appreciate your help or info. Thanks.
wrote:

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1964 thru 1970 General Motors 1/2 ton 2WD pickups, 10 or 12 bolt, all attach to the truck in the same manner. Go salvage yard hunting and find you another rear-end. A 10 bolt will require a special cross u-joint to mate to your drive shaft.
-- Brent Popp The Inmates are running the asylum! ______________________________________________________________________________

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On Wed, 16 Jul 2003 01:31:05 GMT, "Brent Popp"

Thanks. We are out to the bone yard tomorrow with our measuring tapes and a list of axle code specs to see what we can find. We are hoping to luck up on some way to use a series 4 carrier and the 3.73 gears we just bought.
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