Can I machine down some van axles to fit? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72timemachine · 09-05-2018, 03:55 PM

I can lay my hands on some free rear axles out of a '72 1/2 ton, GMC Vandura which has a small block v-8 and th350. They have a spline count of 30, are 33 3/8" long and are a 5 on 5 lug pattern. I found this information on a website and am not sure if it is accurate.

I would like to try and have them shortened if possible to fit a '69 c10 rear end, which currently has an axle spline count of 30, are 30 3/4" with a 6 lug pattern. I do not feel the 6 lug can be re-drilled to locate a 5 on 5 lug pattern due to the larger hub in the center which will not allow my stock rim to fit.

Do you feel this is too expensive a venture? The axles are free. The cheapest kit I can find is upward of $280 for axles, bearings, seals and lug studs. I would also have to get new drums as they do not come with the kit.

Anyone ever shortened a rear end, the difference, if my math is correct is 2 5/8" between the 5 lug van axle and my 6 lug axle.

Thanks for any advice.

Coley · 09-05-2018, 04:54 PM

What do you expect to pay to have them professionally shortened?....do you have a buddy with a machine shop and who welds who you can trade some stuff for?
That isn't necessarily quick work if it is to be done correctly and shop rates for qualified machinists aren't free these days.

To be honest, the $280 kit sounds more economical and a lot less hassle and worry to me..

my two bits..
Coley

GASoline71 · 09-05-2018, 09:03 PM

I used the Moser 5 lug conversion axles when I went to 5 lug in a 1969 C10 housing. $265 bucks shipped to my door from Summit Racing. EZPZ install.

Gary

72timemachine · 09-08-2018, 05:19 PM

Update:

After talking with a few area machine shops, it can be done, it's just the labor rate is just about equal to buying a conversion kit, also bear in mind, the axles were free, that was my only reason for asking members here in the forum is they have ever tried to do something such as this.

If you do happen to know a machinist and you can work out something in a trade for his labor or you live in a region of the country where labor rates may not be as high as the ones here in California, it could still be worth looking into.

09-05-2018, 03:55 PM	#1
72timemachine Registered User Join Date: Oct 2008 Location: los angeles ca Posts: 220	Can I machine down some van axles to fit? I can lay my hands on some free rear axles out of a '72 1/2 ton, GMC Vandura which has a small block v-8 and th350. They have a spline count of 30, are 33 3/8" long and are a 5 on 5 lug pattern. I found this information on a website and am not sure if it is accurate. I would like to try and have them shortened if possible to fit a '69 c10 rear end, which currently has an axle spline count of 30, are 30 3/4" with a 6 lug pattern. I do not feel the 6 lug can be re-drilled to locate a 5 on 5 lug pattern due to the larger hub in the center which will not allow my stock rim to fit. Do you feel this is too expensive a venture? The axles are free. The cheapest kit I can find is upward of $280 for axles, bearings, seals and lug studs. I would also have to get new drums as they do not come with the kit. Anyone ever shortened a rear end, the difference, if my math is correct is 2 5/8" between the 5 lug van axle and my 6 lug axle. Thanks for any advice.

09-05-2018, 04:54 PM	#2
Coley Registered User Join Date: Oct 2011 Location: Victoria, B.C Posts: 3,794	Re: Can I machine down some van axles to fit? What do you expect to pay to have them professionally shortened?....do you have a buddy with a machine shop and who welds who you can trade some stuff for? That isn't necessarily quick work if it is to be done correctly and shop rates for qualified machinists aren't free these days. To be honest, the $280 kit sounds more economical and a lot less hassle and worry to me.. my two bits.. Coley __________________ ....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500

09-08-2018, 05:19 PM	#4
72timemachine Registered User Join Date: Oct 2008 Location: los angeles ca Posts: 220	Re: Can I machine down some van axles to fit? Update: After talking with a few area machine shops, it can be done, it's just the labor rate is just about equal to buying a conversion kit, also bear in mind, the axles were free, that was my only reason for asking members here in the forum is they have ever tried to do something such as this. If you do happen to know a machinist and you can work out something in a trade for his labor or you live in a region of the country where labor rates may not be as high as the ones here in California, it could still be worth looking into.



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