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RiggerWings
Joined: Wed Nov 15th, 2017
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The larger 31 splines have an axle housing of about 3.25". I would imagine if you wrap a string around it and measure between two marks, then divide by pie (3.14) it'll tell you which one you have.
About 10 1/4" circumference would be the larger 3.25" housings which equals 31-spline.
Then again, I'm not sure if axle housing sizes differed with the 7.5" rear end. I would imagine all those are 28-spline, not sure though.
Last edited on Thu Dec 21st, 2017 09:44 pm by RiggerWings
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2011 Ranger Sport 4x4, daily
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2013 Mazda CX5, grocery getter
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