Narrow a rear end

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Malibu ss 64
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Narrow a rear end

Postby Malibu ss 64 » Wed Feb 18, 2009 1:52 pm

Hi!

I have a spare rear that I´m going to build up with left over parts. It´s a El camino 71 12 bolt with a 2.73 gear from start it was a open rear, the carrier and axles are gone. Have a 2 series posi in parts and aftermarket axles, the axles are 2" shorter than 68-72 axles so I need to narrow the housing. So I´m going to make my own jig all I´ve seen and heard about are made with a bar+bushings, it´s easier for me to get my hands on a pipe then a bar will a pipe work instead of a bar or will it be to stiff? is it more common that a pipe is not as straight as a bar?

Will it be a bad idea to not replace the pinion bearings?

Marcus

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monzaz
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Re: Narrow a rear end

Postby monzaz » Fri Feb 20, 2009 4:24 pm

Wow marcus...I do not know about your plans there. You would be surprised on if your off just a little bit on the ends that the bearings in the axles will bind and you will get a resonance noise from the rear bearings.

I can not recommend this way of shortening the housing.

New bearing and old races are also not the greatest Idea...Yes they will work BUT you will have premature bearing failure down the road...months years decade??? Hard to say. BUT why take a chance on 10.00 part for both. Jim
J D Race

Malibu ss 64
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Re: Narrow a rear end

Postby Malibu ss 64 » Sat Feb 21, 2009 7:07 am

Thanks for the answer!

So I need to find a bar then instead of a pipe I guess and make a jig like this?

Image

Marcus

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monzaz
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Re: Narrow a rear end

Postby monzaz » Mon Feb 23, 2009 1:35 pm

Yes but you do not need one that long...lol. You can do one side at a time. The bar will cost you less. I would say a 3 -3 1/2 foot long bar at least 1" -1 1/2" diameter. You will be good for sure. Jim
J D Race

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monzaz
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Re: Narrow a rear end

Postby monzaz » Mon Feb 23, 2009 1:37 pm

Try a machine shop. They will have stock laying around and maybe if your a real nice guy they can chuck it up and test for straightness and run it through the lathe and hit it over to true it up. It will cost some dough ....BUT will save you the headache in the end. Jim
J D Race


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