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Old 11-19-2012, 08:40 AM
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High Performance Rear Ends
 
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It's a 9 inch, not the 9 3/8. I've got several of the 9 3/8 chunks and cobalt is right about the top rib turning down at the end. That is either the WAR or WAB case, which are the weakest of all the 9 inch cases. The '57 to '64 9 inch rear ends were not as strong as the '65 and later rear ends. The housings got stronger in '65 and the later cases had more material around the pinion pilot bearing.
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