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30 spline, female, for GM 12-Bolt
28 spline, female, 9" Ford standard pinion
10 spline, female, for Quick Change rears
35 spline, male, 9" Ford large pinion
10 spline, female, for '49 - '50 Olds-Pontiac
13 spline, female, for '57 - '64 Olds-Pontiac
29 spline, female, for Dana 60™
10 spline, female, for 8-3/4" Mopar
40 spline, female, 12" modular pinion
No internal splines, no heat treat
35 spline, female, 9" Ford large pinion