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Old 01-17-2003, 11:03 AM
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Red face proper length for a model a axle

Please help!!!I'm building a 1930 model a. I have a 9"rear from a 78' bronco. How long does it need to be? Where can I have this done? Any help would be greatly appreciated. No one around here seems to know anything about haveing this done.
Thanks in advance, Ed

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Old 01-17-2003, 03:10 PM
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There is an article in December or January issue of Street Rodder on all the old Ford banjo rear ends showing dimensions for each model they produced. Determine how wide you want your rear end to be and contact Currie, Moser or one of the other rear end suppliers and they can lead you through the process.
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Old 01-17-2003, 05:20 PM
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Most Model A guys go with the early 70's V8 Maverick rear end. It is 56" from wheel mounting flange to wheel mounting flange. It is a 8 inch series rear. There are NO 9" Fords that are that narrow from the factory.

<a href="http://hiqties.hypermart.net/9inch.html" target="_blank">http://hiqties.hypermart.net/9inch.html</a>
<a href="http://www.dfwmotorsport.com/Fairlane/9inchrearends.htm" target="_blank">http://www.dfwmotorsport.com/Fairlane/9inchrearends.htm</a>

<a href="http://www.kevinstang.com/Ninecase.htm" target="_blank">http://www.kevinstang.com/Ninecase.htm</a>

These are some sites for 9" Ford information. I would use a 9" if at all possible......56 inches wide.


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Old 01-18-2003, 03:01 PM
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[quote]Originally posted by topcat662:
<strong>Please help!!!I'm building a 1930 model a. I have a 9"rear from a 78' bronco. How long does it need to be? Where can I have this done? Any help would be greatly appreciated. No one around here seems to know anything about haveing this done.
Thanks in advance, Ed</strong><hr></blockquote>

The best way to figure out how wide (not long) to make the rear end, is to place the wheels and tires you are going to use under your fenders the way you want them to look when finished. Measure the distance from the inside mounting surface from one rim to the other. That is how wide your rear axle assembly should be from the wheel mounting surface (outer edge of the brake drum) to the mounting surface on the other side. If you just have the rear housing narrowed to the same width as the original Model 'A', the wheels you want to use may stick out beyond the edge of the fenders. This can be corrected by using a greater backspace somewhat, but then you will lose the 'look' you were after in the first place.

The next step is to decide whether you want the pumpkin centered under the car or offset. This will determine how much needs to be removed from each axle tube of the rear housing. The actual narrowing of the housing is best done in a fixture to insure that the bearing ends are perpendicular to the axle housings. There are several methods to do this and if you are not sure of how to do it, then have it done by a machine shop. Some axle shafts can be shortened and resplined or you can purchase new axles from several excellent sources such as Strange and Moser. Good luck and ENJOY!!!
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Old 01-18-2003, 03:33 PM
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I thought that the early 77 back small Bronco had a 54" 9" 28 spline housing? Is this right?
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Old 01-18-2003, 04:17 PM
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[quote]Originally posted by roys63:
<strong>I thought that the early 77 back small Bronco had a 54" 9" 28 spline housing? Is this right?</strong><hr></blockquote>

58" wheel flange to wheel flange.

Measuring from the backing plate to backing plate is NOT a good measurement...... The different width brake shoes affect the measurement.

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Old 01-18-2003, 06:31 PM
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Don't forget the offset of the wheel and the tire size. Without modification of the inner wheel wells or use of the wider than stock fibreglass fenders you can't really use jumbo-size tire son the back of an Abone without the tires stciking out like a 1970s dorkmobile.
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Old 01-19-2003, 02:03 AM
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Thats right!! I remember what we did we cut the pass side of the housing and used 2 drivers side axles{The short ones} to narrow.

[ January 19, 2003: Message edited by: roys63 ]</p>
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