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  1. Hot to Tell Axle Spline, Diff Questions

    Classic Cougar Tech
    Does anyone know how to tell how many splines are on an axle? I've got a 67 Cougar with what I believe is an open 3.00 8" diff. I'm just curious because I found a complete 8.8" 31 spline rear diff from a Crown Vic on CList with Posi and 3:23 gearing for 200 and a set of 3:73 gears for 150. It'd...
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