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It would have been foolish if they didn't upgrade them from the 26 spline, to the 28 spline when the Caprice sedan got much heavier for 91. However, a posi in a 7.5", in a Caprice... That is a disaster just waiting to happen. There is a reason they never put a positraction in a 7.5" in a 91-96 Caprice sedan.
 
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