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#1: 1 more part of the puzzle Author: kb426Location: Kansas PostPosted: Sat, Apr 08 2017, 8:51 pm
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This is a short video that shows an overview of shortening the left side tube for centered pinion placement.

https://youtu.be/GLLCshT6qlo

#2:  Author: enjenjoLocation: Swanton, Ohio PostPosted: Sat, Apr 08 2017, 10:24 pm
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Just in case you didn't know, most rear ends are bent. 90% of the ones I have cut were bent when I started on them.

#3:  Author: chimp kooseLocation: Saskatoon Saskatchewan Canada PostPosted: Sun, Apr 09 2017, 1:56 pm
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I believe I read in an engineering text somewhere that axle splines are designed to run with up to .050" mis-alignment per foot . I have used a lathe to shorten housings before and when one end is dialed in a 4 jaw and the other is in a pipe centre some housings spin like a skipping rope !

#4:  Author: phat46Location: In da Thumb of Michigan PostPosted: Wed, Apr 12 2017, 4:16 pm
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I've only ever narrowed one rear end, a Ford 9". I didn't know how it was done and all I wanted was to center the pumpkin so I just needed to shorten the longer tube. I just cut it loose from the pumpkin, cut four inches off it and welded it back in. I took it to a guy that had a jig. And he checked it for straight. It was perfect he said!! 😄 I often have wondered why the outside end is usually cut off on a Ford, seems easier to me to cut the tube at the other end, but I probably am overlooking something. The guy I took it to to check it on his jig said he had never seen one done like that, but didn't see any problem with doing it that way.

#5:  Author: enjenjoLocation: Swanton, Ohio PostPosted: Wed, Apr 12 2017, 4:31 pm
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Quote:
I often have wondered why the outside end is usually cut off on a Ford, seems easier to me to cut the tube at the other end,


Because they are usually bent. Shocked So when you weld it back together, you weld the end on straight, and let the tube end up where it may.

#6:  Author: kb426Location: Kansas PostPosted: Wed, Apr 12 2017, 4:50 pm
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All the aftermarket ends I used for a 9" have a flat flange on them that lets it float in any direction to give proper alignment. This was the 1st rear that I have done without cutting off the ends and installing new ends. My narrowing has been either drag racing or pro street applications.



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