1964 1/2 ton C10 rear differential - HELP!
 

Hi guys!

First off, I love the site and have been a member for a few years. I mainly research and follow builds to use them as inspiration for my frame off that I am currently in the middle of - so thanks to all of you for sharing your knowledge!

I have tried researching my question but have gotten lost in all of the information and would like to directly ask my question.

I have a 64' 12 bolt stock rear end. Here is what I would like to do...

I would like to continue on with the 3.73 gears but change from 6 lug to 5 lug however the axles that Early Classic sells are 30 spline and from my research my rear differential came with 17 spline axles.

So what I was thinking of doing was completely replacing all the internals (for peace of mind that everything is new) and then of course the new stuff will accept the Early Classic 30 spline 5 lug axles and then I will also upgrade the drum brake kit.

I went to a rear differential shop and they quoted me $2500!!!! They said what I am asking for is difficult and they do not make the replacement parts for this (1964) rear differential as much anymore, that is why the price is so high.

fyi - the reason why I want to rebuild and keep this rear end is I am a fan of rebuilding what I can and putting that same part back into the 64' VS going with a 71-72 rear differential etc.

What do you guys think? Can what I want to do be done? If so, was the shop crazy or accurate in their information/pricing?

Thank you all for the help!!

Re: 1964 1/2 ton C10 rear differential - HELP!
 

I don't know much. But I did find this thread.
It may or may not help.
http://Www.67-72chevytrucks.com/vboa...d.php?t=519914

Re: 1964 1/2 ton C10 rear differential - HELP!
 

I purchased axles Posi Gears Seals Bearing install kit for $870. from: BRYDON
641-751-8060
staticz2229@gmail.com
All name brand stuff - Mossier, Eaton.
I'm having a local shop install the posi and do the crush sleeve when I get home.

Re: 1964 1/2 ton C10 rear differential - HELP!
 

LostMy65 - thank you!! I had not seen that post before. What I got from it is that it is totally possible because my 12 bolt housing is no different than any other 12 bolt housing, I just need to make sure I purchase the correct internals so that it accepts the 30 spline axles I want to purchase from Early Classic.

Re: 1964 1/2 ton C10 rear differential - HELP!
 

In the end, what will this end up costing you?

Re: 1964 1/2 ton C10 rear differential - HELP!
 

I figure another $250 to $300 more dollars max. I will install the axles as I want to install the rear caliper brackets.

Re: 1964 1/2 ton C10 rear differential - HELP!
 

That is correct. Aside from the width increase in late '70 the truck 12 bolt parts are all pretty much interchangeable from '64-'82. One thing I would do is verify the axle/wheel bearing fitment in your housing.

Re: 1964 1/2 ton C10 rear differential - HELP!
 

How about you get a factory 17 spline posi center section and have your axles drilled five on five save you a lot of money . I do have a friend that has a 17 spline posi unit but I don't no what gear is on it I can check if you want me to good luck

Re: 1964 1/2 ton C10 rear differential - HELP!
 

These kits include spider gears for the conversion.
http://www.summitracing.com/parts/cl...del/c10-pickup
http://www.speedwaymotors.com/Garage...Kit,99617.html
https://www.performanceonline.com/19...XLE-KIT-5-LUG/